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# 2-Cent Tips

### Two-cent Tip: number conversion between between base-x to base-y

Mulyadi Santosa [mulyadi.santosa at gmail.com]

Sat, 18 Jul 2009 20:35:59 +0700

For those who needs quick help on number conversion between base-x to base-y, bc can lend a help here. For example, what's the hexadecimal form of 116?:

    $ echo 'obase=16; 116' | bc
    74

And what does binary 11010101 look in decimal?

    $ echo 'ibase=2; 11010101' | bc
    213

By doing below step, you directly convert binary 11010101 to hexadecimal:

    $ echo 'obase=16; ibase=2; 11010101' | bc
    D5

Note that "obase" must preced "ibase" in order to make a correct final result.

regards,

    --
    Mulyadi Santosa
    Freelance Linux trainer
    blog: the-hydra.blogspot.com

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Published in Issue 165 of Linux Gazette, August 2009

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