=LEFT(A1,4)&"-"&MID(A1,5,4)&"-"&MID(A1,9,4)&"-"&RIGHT(A1,4)

"shafali" wrote:

I want to add dashes in a cell which has both number and text. for example, a
cell contaion 10G101211100011 and i want to change it to 100G-1012-1110-0011.
Is there a formula i can use?