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The if-else condition in shell script

Educative Answers Team

If-else is a very important coding concept. Just like other programming languages, shell script uses if-else statements to solve problems.

If a condition is true, the algorithm performs a certain action; else, it performs something else.

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Syntax

if [ condition ]
then
  trueAction....
else
  falseAction
fi

Code

The following code outputs “Yes” if the two numbers are equal and “No” if they are not.

var1=50 
var2=60   

if [ $var1 == $var2 ] 
then 
    echo "YES"
else 
    echo "NO"
fi 

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