How to Pad a String with Zeros in ColdFusion

pad function

<cfscript>

/*
  Try It Here: 
  http://www.trycf.com/scratch-pad/gist/eb0302e242c13755a4f2    
*/

writeOutput( pad('123', 5) );

function pad( str, n ){
    return replace( RJustify( str, n ), ' ', '0', 'all' );
}
</cfscript>

You may want to specifically cast it as a string... you never know when ColdFusion will interpret values as numeric and drop the zeros.

return JavaCast("string", replace( RJustify( str, n ), ' ', '0', 'all' ) );