Syntax
if [ expression ] then Statement(s) to be executed if expression is true else Statement(s) to be executed if expression is not true fi
Example
#!/bin/sh a=10 b=20 if [ $a == $b ] then echo "a is equal to b" else echo "a is not equal to b" fi
Nested if-else
!/bin/bash
read -p “Enter value of i :” i
read -p “Enter value of j :” j
read -p “Enter value of k :” k
if [ $i -gt $j ]
then
if [ $i -gt $k ]
then
echo “i is greatest”
else
echo “k is greatest”
fi
else
if [ $j -gt $k ]
then
echo “j is greatest”
else
echo “k is greatest”
fi
fi
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