39 Votes

Delphi: Add leading zeros to a number

Tip by Progger99 | 14.08.2012 at 09:48

Sometimes we want to represent a number with leading zeros when using Delphi, for example, if the numbers become double digits at some point and we directly want to start at 01, 02 and so on. Fortunately there is a simple Delphi function which can do this for us:

str := Format('%.*d',[length, number]);
str := Format('%.*d',[3, 7]);
//str is '007'

The two required parameters are the number of places that we want to have (length) and the integer, we want to rewrite (number). The return value is a string.

In the second line you can see an example: When we call the function with the parameters 3 and 7, we get '007'.

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