arth-operator.sh

#!/bin/bash

a=5
b=6

echo "$((a+b))"
echo "$((a-b))"
echo "$((a*b))"
echo "$((a/b))" # 5/6
echo "$((a%b))"
echo "$((2**3))" # 2*2*2


((a++)) # a=a+1
echo $a

((a+=3)) # a=a+3
echo $a