Select the cell or range where you want the comma
Type the comma directly from the keyboard
Use `=A1&”,”&B1` to add a comma between cell values
Use `=TEXTJOIN(“,”,TRUE,A1:A10)` to join values with commas
Use `=CONCAT(A1,”,”,B1)` to combine text with a comma
Use Find and Replace to add commas to existing text
Use Custom Number Format if you want commas in numbers
Use `Ctrl + H` to open Find and Replace
Enter the text to change in Find what
Enter the comma in Replace with
Click Replace All