bash + divide number with round number to up or down

Question

I want to convert 8874M to GIGA so I did this

  echo $(( 8874 / 1024 ))

but actually we get 8 ( while exactly results is 8.6 )

so what need to change in order to get the 8.6?

I'm downvoting this because you just asked virtually the same question 50 minutes ago and you must not have read any of the answers/comments from it. — jesse_b, Feb 12 '18 at 14:28

score 1 · Accepted Answer · answered Feb 12 '18 at 14:24

1

Bash doesn't do floating point arithmetics. Use bc -l instead:

bc -l <<< 'scale = 1; 8874 / 1024'

By setting scale to 1, you get the "exact" result 8.6, not the real exact result of 8.66601562500000000000.

answered Feb 12 '18 at 14:24

choroba

its not work when I put the variable inside bc -l <<< 'scale = 1; $NUM / 1024' – jango Feb 12 '18 at 14:35
Variables are expanded in double quotes, not single quotes. – choroba Feb 12 '18 at 14:38
@jango: Please read the following: [Quoting](https://www.gnu.org/software/bash/manual/bashref.html#Quoting) – jesse_b Feb 12 '18 at 14:38

1 Answers1