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shell script to add two numbers using function
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| #!/bin/bash | |
| # above line used to specify which shell to be used to execute the program | |
| add() # function to add 2 numbers | |
| { | |
| num1=$1 | |
| num2=$2 | |
| sum=`expr $num1 + $num2` # things insed the backtick `are evaluate or executed | |
| echo "$num1 + $num2 = $sum" | |
| } | |
| echo "Enter first Number" # echo used to print the message to screen | |
| read first_number # read and store the input from terminal | |
| echo "enter second Number" | |
| read second_number | |
| add $first_number $second_number # call the add function | |
| # give execution permission to file before running the program like bellow | |
| # chmod +x add2.sh | |
| # run the program by ./add2.sh |
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