Writing an inequality and using the IF function in Excel

To write an inequality in Excel, use the and < symbols. For example, "20<x<40" can be written as "20<x and x<40" in Excel.

To write "5" in the cell if the inequality is true, use the IF function. Here are the steps:

1. Select the cell where you want to write the result (in this case, "5").
2. Type the following formula in the formula bar:
   Code:

   =IF(AND(x20,x<40),5,"")

3. Press Enter.

This formula checks if the value of "x" is greater than 20 and less than 40. If the condition is true, it will write "5" in the cell. If the condition is false, it will leave the cell blank.

Note that you need to replace "x" with the cell reference that contains the value of "x". For example, if the value of "x" is in cell A1, you can write the formula as .