Conditional Statement(if-else-if)

In the case of the first 'if statement', if a condition goes false, then the second 'if condition' is checked.

if [ condition ];  
then  
<commands>  
elif [ condition ];  
then  
<commands>  
else  
<commands>  
fi  

 
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Example 2
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#! bin/bash
# if-else-if statement
count=10
if (( $count < 9 ))
then
echo "the condition is true:"
elif (( $count <= 9 ))
then
echo " the condition is true"
else
echo " the condition is false"
fi

[prabhucloudxlab@cxln4 ~]$ sh hello.sh
 the condition is false

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Example 2
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#! bin/bash
# if-else-if statement

count=10
if (( $count < 9 ))
then
echo "the 1st condition is false:"
elif (( $count > 9 ))
then
echo " the 2nd condition is true"
else
echo " the 2n condition is false"
fi

[prabhucloudxlab@cxln4 ~]$ sh hello.sh
 the 2nd condition is true

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Example 1
Following example consists of two different scenarios wherein the 
first else-if statement, the condition is true, and in the second else-if statement, 
the condition is false.
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--Bash Script
[haritaraka12078@cxln4 ~]$ cat>elif1.sh
#!/bin/bash
read -p "Enter a number of quantity:" num
if [ $num -gt 100 ];
then
echo "Eligible for 10% discount"
elif [ $num -lt 100 ];
then
echo "Eligible for 5% discount"
else
echo "Lucky Draw Winner"
echo "Eligible to get the item for free"
fi


[haritaraka12078@cxln4 ~]$ sh elif1.sh
Enter a number of quantity:120
Eligible for 10% discount

[haritaraka12078@cxln4 ~]$ sh elif1.sh
Enter a number of quantity:80
Eligible for 5% discount

[haritaraka12078@cxln4 ~]$ sh elif1.sh
Enter a number of quantity:1000
Eligible for 10% discount

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Example 2
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-- Bash Script
[haritaraka12078@cxln4 ~]$ cat>elif2.sh
#!/bin/bash
read -p "Enter a number of quantity:" num
if [ $num -gt 200 ];
then
echo "Eligible for 20% discount"
        elif [[ $num == 200 || $num == 100 ]];
        then
        echo "Lucky Draw Winner"
        echo "Eligible to get the item for free"
            elif [[ $num -gt 100 && $num -lt 200 ]];
            then
            echo "Eligible for 10% discount"
            elif [ $num -lt 100 ];
then
echo "No discount"
fi


[haritaraka12078@cxln4 ~]$ sh elif2.sh
Enter a number of quantity:100
Lucky Draw Winner
Eligible to get the item for free

[haritaraka12078@cxln4 ~]$ sh elif2.sh
Enter a number of quantity:200
Lucky Draw Winner
Eligible to get the item for free

[haritaraka12078@cxln4 ~]$ sh elif2.sh
Enter a number of quantity:250
Eligible for 20% discount

[haritaraka12078@cxln4 ~]$ sh elif2.sh
Enter a number of quantity:80
No discount