Shell Script If Statement

If Statement

• In shell script, if statement is used to execute a single condition or rule
• If the condition is true, then true statements will be executed otherwise false statements will be executed.

Syntax

        if [ condition ]

        then

               true statements

        else

               false statements

        fi

Note

• The keyword fi should be used to complete the if syntax.

Example

(p1.sh)

Source Code

    echo "--------------------------------"

    echo -e "\t If Statement Example"

    echo "--------------------------------"

    echo "Enter a number: "

    read n

# get a remainder of base 2 using c style code

    r=$((n%2))

# find the odd or even number using remainder option

    if [ $r -eq 0 ]

    then

        echo "This is Even Number"

    else

        echo "This is Odd Number"

    fi

Output

Video Demo