HackerRank The World of Numbers problem solution

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 '1\n2'|./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]"