You’ll use the Format function most often with numbers, but it can be useful when applied to strings as well. For example, you can format a credit card number-which is held in a string variable, even if it contains only digits-and subdivide the number into four groups of four characters each, using a complex string expression:
' X holds the sequence of 16 digitsCreditCardNum = Left$(x, 4) & " " & Mid$(x, 5, 4) & " " & _ Mid$(x, 9, 4) & " " & Right$(x, 4)The Format function lets you accomplish the same result in a more readable and efficient way:
CreditCardNum = Format$(x, "!@@@@ @@@@ @@@@ @@@@")
