First zero is eliminating in the awk command

Shell Programming and Scripting
1

I am using something like this in my code

nawk 'BEGIN{OFS=FS="|"} {$15='$CalaMig'} {print}' filename

actually value of $CalaMig=01234

But its replacing as 1234 in the 15th postion.Its not taking the first zero.

can some one help here

2

Try using sprintf.

i.e.

$ CalaMig=123
$ echo 1 2 3 | awk '{$2 = sprintf("%05d", '$CalaMig')}1'
1 00123 3

Otherwise, using quoting:

$ CalaMig=0123
$ echo 1 2 3 | awk '{$2 = "'$CalaMig'"}1'
1 0123 3