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echo "enter the first num:" 
read n1
echo "enter the second num:"
read n2
sum=`echo $n1 +$n2 |bc`
echo "sum="$sum

Success #stdin #stdout 0.01s 5324KB

stdin

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1
2

stdout

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enter the first num:
enter the second num:
sum=3

https://ideone.com/3cZTt3

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Bash (bash 5.0.3)

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public

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