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#1
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The most basic question ever - what does "i" mean
Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know
everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. |
#2
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The most basic question ever - what does "i" mean
i is a variable. The name was Bill's choice--almost arbitrary. He wouldn't use
a variable named Long, Integer, Row, Font, Bold or any thing built into excel's VBA--or any illegal name (VBA's help will explain more). In this case, I bet Bill has a line like: Dim i As Long (or "Dim i as integer") in his code In this case, it's a place holder that he can use for looping between the number 1 and the number that's stored in that FinalRow (another variable). So for the first time through (when i = 1): Range ("A" & 1 & ":E" & 1).Font.Bold = True which is: Range ("A1":E1").Font.Bold = True The 2nd time through, i = 2: Range ("A" & 2 & ":E" & 2).Font.Bold = True which is: Range ("A2":E2").Font.Bold = True If he had 1000 rows to bold, it would be very ugly to use 1000 lines like: Range ("A1":E1").Font.Bold = True Range ("A2":E2").Font.Bold = True Range ("A3":E3").Font.Bold = True Range ("A4":E4").Font.Bold = True ... Range ("A1000":E1000").Font.Bold = True jknapp1005 wrote: Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. -- Dave Peterson |
#3
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The most basic question ever - what does "i" mean
jknapp1005 wrote:
Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. iterator - a variable which changes its value (usually by 1) in every iteration of the loop. "i" was the simplest what could be chosen to name iterator check also Hungarian notation. It has something to do with International Space Station :) |
#4
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The most basic question ever - what does "i" mean
jknapp1005 wrote:
Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. I found one: http://mathworld.wolfram.com/i.html The code is complex. |
#5
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The most basic question ever - what does "i" mean
smartin wrote:
without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. I found one: http://mathworld.wolfram.com/i.html The code is complex. O yes, it is really about complex numbers. :) |
#6
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The most basic question ever - what does "i" mean
"smartin" wrote in message ... jknapp1005 wrote: Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. I found one: http://mathworld.wolfram.com/i.html The code is complex. Are you NUTS? I is a variable to hold an integer value. Why make something complex out of it? |
#7
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The most basic question ever - what does "i" mean
witek wrote:
smartin wrote: without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. I found one: http://mathworld.wolfram.com/i.html The code is complex. O yes, it is really about complex numbers. :) Actually, the code is imaginary. There can be no "FinalRow" because there is always one more row. This concept has been demonstrated many times. For a perfect example you can read this: http://mathschallenge.net/index.php?...nfinite_primes but this is a much more succinct proof: If we write For i = 1 to FinalRow ... Next i It is the same as i = 1 While i <= FinalRow ' Note 1 ... i = i + 1 ' Note 2 Wend Note 1: Aha! i is the duck that eats i + 1, so i always gets bigger [especially when cheeseburgers are nearby], so FinalRow must be a nondecreasing function of i. Therefore as i go, you go. Note 2: Now, how can i = i + 1, really ??? There are only two possibilities: either FinalRow is unbound, so either i = infinity, or 1=2. I think the latter can be proved, but I've lost my notes on that one. So the former must be true. However if you have so many rows that Excel craps out, you have a cheeseburger, and then the next row is imagined: QED. |
#8
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The most basic question ever - what does "i" mean
measekite's psychiatrist wrote:
"smartin" wrote in message ... jknapp1005 wrote: Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. I found one: http://mathworld.wolfram.com/i.html The code is complex. Are you NUTS? I is a variable to hold an integer value. Why make something complex out of it? You're the psychiatrist (^: I eat almonds. You are what you eat. Therefore... |
#9
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The most basic question ever - what does "i" mean
jknapp1005 wrote:
Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. Ok I've had my fun with your missive and departed from my usual habit of not baiting rhetorical (trollish) posts. Others have given some very sane and reasonable explanations for the meaning of "i" in the context of your post (even though you didn't ask for that). I hope they made sense. jknapp1005, If you spent any time at all looking at code--in any language--you will encounter "i" as it is commonly used, as the saner posters described, as a generic looping variable. To the point: I suggest you engage in a couple minutes of independent study to make sure you are not overlooking the obvious before attacking anyone. If the concept still doesn't make sense, ask a reasonable question, not a rhetorical (trollish) one. |
#10
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The most basic question ever - what does "i" mean
Sorry, smartin, not meaning to be trollish. Actually, I DID spend a good hour
trying to find some definition of "i". It may seem obvious to you folks, but as someone who is fairly new, it is isn't really obvious to me. I do realize to those who are experienced, it would seem like a basic question. But I looked in the index, online, in the VBA editor window, and couldn't find anything that described it. I even referenced other's books, and didn't see it being used. Yeah, sometimes the most basic things do escape me. Thanks for posting. "smartin" wrote: jknapp1005 wrote: Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. Ok I've had my fun with your missive and departed from my usual habit of not baiting rhetorical (trollish) posts. Others have given some very sane and reasonable explanations for the meaning of "i" in the context of your post (even though you didn't ask for that). I hope they made sense. jknapp1005, If you spent any time at all looking at code--in any language--you will encounter "i" as it is commonly used, as the saner posters described, as a generic looping variable. To the point: I suggest you engage in a couple minutes of independent study to make sure you are not overlooking the obvious before attacking anyone. If the concept still doesn't make sense, ask a reasonable question, not a rhetorical (trollish) one. |
#11
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The most basic question ever - what does "i" mean
That's a very good answer. Thank you very much.
"smartin" wrote: witek wrote: smartin wrote: without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. I found one: http://mathworld.wolfram.com/i.html The code is complex. O yes, it is really about complex numbers. :) Actually, the code is imaginary. There can be no "FinalRow" because there is always one more row. This concept has been demonstrated many times. For a perfect example you can read this: http://mathschallenge.net/index.php?...nfinite_primes but this is a much more succinct proof: If we write For i = 1 to FinalRow ... Next i It is the same as i = 1 While i <= FinalRow ' Note 1 ... i = i + 1 ' Note 2 Wend Note 1: Aha! i is the duck that eats i + 1, so i always gets bigger [especially when cheeseburgers are nearby], so FinalRow must be a nondecreasing function of i. Therefore as i go, you go. Note 2: Now, how can i = i + 1, really ??? There are only two possibilities: either FinalRow is unbound, so either i = infinity, or 1=2. I think the latter can be proved, but I've lost my notes on that one. So the former must be true. However if you have so many rows that Excel craps out, you have a cheeseburger, and then the next row is imagined: QED. |
#12
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The most basic question ever - what does "i" mean
That's really great, actually. I couldn't find anything like that. Although
you guys are having fun takin' shots (which I'm sure I deserve), I actually learned something from that. Thanks. "smartin" wrote: jknapp1005 wrote: Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. I found one: http://mathworld.wolfram.com/i.html The code is complex. |
#13
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The most basic question ever - what does "i" mean
Thanks. Very helpful.
"witek" wrote: jknapp1005 wrote: Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. iterator - a variable which changes its value (usually by 1) in every iteration of the loop. "i" was the simplest what could be chosen to name iterator check also Hungarian notation. It has something to do with International Space Station :) |
#14
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The most basic question ever - what does "i" mean
Thanks, Dave. You were much gentler on me than I probably deserved. Sometimes
the simplest things are the most frustrating (for me anyway). Thanks very much! "Dave Peterson" wrote: i is a variable. The name was Bill's choice--almost arbitrary. He wouldn't use a variable named Long, Integer, Row, Font, Bold or any thing built into excel's VBA--or any illegal name (VBA's help will explain more). In this case, I bet Bill has a line like: Dim i As Long (or "Dim i as integer") in his code In this case, it's a place holder that he can use for looping between the number 1 and the number that's stored in that FinalRow (another variable). So for the first time through (when i = 1): Range ("A" & 1 & ":E" & 1).Font.Bold = True which is: Range ("A1":E1").Font.Bold = True The 2nd time through, i = 2: Range ("A" & 2 & ":E" & 2).Font.Bold = True which is: Range ("A2":E2").Font.Bold = True If he had 1000 rows to bold, it would be very ugly to use 1000 lines like: Range ("A1":E1").Font.Bold = True Range ("A2":E2").Font.Bold = True Range ("A3":E3").Font.Bold = True Range ("A4":E4").Font.Bold = True ... Range ("A1000":E1000").Font.Bold = True jknapp1005 wrote: Bill Jelen wrote a book for VBA in Excel 2007. I guess he thinks I know everything. He is writing things and not explaining what they are. All the sudden he's writing section of macros that say things like: FinalRow = Cells(Rows.Count, 1). End(xlUp).Row For i = 1 to FinalRow Range ("A" & i & ":E" & i).Font.Bold = True Next i without explaining what the heck "i" means. Try searching for the meaning of "i" in any database. -- Dave Peterson |
#15
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The most basic question ever - what does "i" mean
jknapp1005 wrote:
Sorry, smartin, not meaning to be trollish. Actually, I DID spend a good hour trying to find some definition of "i". It may seem obvious to you folks, but as someone who is fairly new, it is isn't really obvious to me. I do realize to those who are experienced, it would seem like a basic question. But I looked in the index, online, in the VBA editor window, and couldn't find anything that described it. I even referenced other's books, and didn't see it being used. Yeah, sometimes the most basic things do escape me. Thanks for posting. Ok, I am glad to know you were not just trolling. Hope there are no hard feelings. Was your question answered? |
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