Bash Programming : Addition

Here I tried this on ubuntu

To create the file


code type in the terminal:

read a
read b
sum=`expr $a + $b`
echo $sum

don’t give space after or before equal sign

save the file and close editing mode:


change the permission of this file:

chmod +x add

to show the output

sh add

Shortcut method for addition or any other:
create a file with cat then type code from the below in one line

echo `expr $1 + $2 + $3`

here 1 2 and 3 is variable is taking input from user and also giving teh output so we sue $ before them….it is the shortcut method

then just type

sh shortcut 3 4 5

and you will get the addition of this variables

It would be a great help, if you support by sharing :)
Author: zakilive

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