In this HackerRank The World of Numbers problem solution Values can be read from the command line using the read command. See the following code.
read a
read b
echo $a
echo $b
Invoked from the command line:
echo ‘1n2’|./read.sh
1
2
To perform an operation, surround the variables with (()) or [] and precede with a $ sign.
read a
read b
echo $[a+b]
echo $((a-b))
we have given two integers, X and Y, find their sum, difference, product, and quotient.
Problem solution.
read x read y echo $(expr $x + $y) echo $(expr $x - $y) echo $(expr $x * $y) echo $(expr $x / $y)
Second solution.
read x
read y
echo "$[ $x + $y]"
echo "$[ $x - $y]"
echo "$[ $x * $y]"
echo "$[ $x / $y]"
