Hexadecimal To Decimal in Shell Script Hexadecimal To Decimal in Shell Script bash bash

Hexadecimal To Decimal in Shell Script


bash shell hex decimal

To convert from hex to decimal, there are many ways to do it in the shell or with an external program:

With bash:

$ echo $((16#FF))255

with bc:

$ echo "ibase=16; FF" | bc255

with perl:

$ perl -le 'print hex("FF");'255

with printf :

$ printf "%d\n" 0xFF255

with python:

$ python -c 'print(int("FF", 16))'255

with ruby:

$ ruby -e 'p "FF".to_i(16)'255

with node.js:

$ nodejs <<< "console.log(parseInt('FF', 16))"255

with rhino:

$ rhino<<EOFprint(parseInt('FF', 16))EOF...255

with groovy:

$ groovy -e 'println Integer.parseInt("FF",16)'255

bash shell hex decimal

Dealing with a very lightweight embedded version of busybox on Linux means many of the traditional commands are not available (bc, printf, dc, perl, python)

echo $((0x2f))47hexNum=2fecho $((0x${hexNum}))47

Credit to Peter Leung for this solution.

bash shell hex decimal

One more way to do it using the shell (bash or ksh, doesn't work with dash):

echo $((16#FF))255

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