Pad 0 to the right

UNIX for Beginners Q & A
1

I need to pad 0 to a number on the right. to make it 9 digit in total.

My number is 2457

output should be 245700000

2

One way in Bash could be:

n=$(printf "%-9s" 2457)
printf "%s\n" ${n// /0}
245700000
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3

Or

printf "%s%0*d\n" ${X} $((9-${#X})) 0
245700000
printf "%s%0$((9-${#X}))d\n" ${X}
245700000
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4

The latter suggestion is portable.
Once defined as a function it becomes handy:

rightpad0() { printf "%s%0$((${1}-${#2}))d\n" "${2}"; }

rightpad0 9 2457
245700000
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