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I need to convert 1, 11, 111, and 1111 to 0001, 0011, 0111, and 1111, and then append some text to the resultant. I know how to format the cells as custom 4 digits, but this does not allow me to use them in a formula and append text.

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Do you need to always append the same text or will it vary? – Christophe May 25 '14 at 15:07
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@ChristopheC Text is appended from a different column. LDC3's solution works. – user1032531 May 25 '14 at 15:09
up vote 10 down vote accepted

To add leading zeros, use the TEXT function:

=TEXT(A1,"0000")

enter image description here

To append text, use &

= C1&B1

enter image description here

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I'm using LibreOffice, but you should have these functions in Excel:

=CONCATENATE(TEXT(A1,"0000")," ",A2)
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