st: leading zeros in string format

[Michael Stewart <michaelstewartresearch@gmail.com>]

HI
I am trying to convert a string  variable to a string variable with
fixed numbers

My string variable has following observations:
1223435
34567
345

I want to convert it to another string variable with leading zeros
1223435
0034567
0000345

format var "%07.0f" didnt work

Thank you ,
Yours Sincerely,
Mike.
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