Excel: Use number from one cell to write a string in another cell

Question

I have one column in excel with numbers. I need to use that number to write a string in another cell. For example, Column A has "21" , in column BI need to write a string of 21 0's. Then there should be periods so the total number of characters=40.

Duration    ch
21          000000000000000000000..................
22          0000000000000000000000.................
19          0000000000000000000....................
21          000000000000000000000..................

Answer 1

You can use the REPT() formula to do this:

Assuming your first Duration is in Cell A1

=REPT("0", A1) & REPT(".", 40-A1)

This will repeat "0" as many times as the number in A1 and then will concatenate repeated "." until you have 40 characters.