top 8 commands to calculate in Linux Terminal

We use to publish list of commands for linux and Termianl. Must check out our other posts.

👉#1 command expr

 $ expr 1 + 1

👉#2 command let

 $ let myvar+=1 ; echo $myvar

👉#3 command var

 $ myvar=3 && echo $myvar ; echo $((myvar+2))

👉#4 command echo

 $ echo "15.6+299.33*2.3/7.4" | bc

👉#5 command printf

 $ printf "$((10*3))

👉#6 command awk

 $ awk "BEGIN {print 100/3}"

👉#7 command sed

 $ echo 12 | sed 's/[0-9]*/&+3/'

👉#8 command perl

 $ echo 'a12' | perl -pe 's/([0-9]+)/($1+3)/e'

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