if Conditional Statement in Shell Script

courtesy-byterevel.com

Bash shell Script also provide if-else conditional statement like other programming languages. If-else statement helps to evaluate perform different computations or actions depending on whether a programmer-specified boolean condition evaluates to true or false.

There are three different if-else forms provided by shell script

1. if-else-fi

if condition
then

perform some action

else

perform other action

fi

2. if-fi

if condition
then

perform some action

fi

3. if-elif-else-fi

if condition 
then

perform some action

elif condition then

perform 2nd action

else

perform other action

fi

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