Bash test command enables you to compare two numeric values. You can perform six different operations under numeric comparison which are listed in the below table-
| Condition | Explanation |
|---|---|
| [ num1 -gt num2 ] | Checks if num1 is greater than num2. |
| [ num1 -ge num2 ] | Checks if num1 is greater than or equal to num2. |
| [ num1 -lt num2 ] | Checks if num1 is less than num2. |
| [ num1 -le num2 ] | Checks if num1 is less than or equal to num2. |
| [ num1 -eq num2 ] | Checks if num1 is equal to num1. |
| [ num1 -ne num2 ] | Checks if num1 is not equal to num2. |
#Bash Shell Script to check whether you are eligible for voting or not read -p "Enter your age: " age if [ $age -ge 18 ] then echo "You are eligible for voting." else echo "You are not eligible for voting." fi
Output of the above program
Enter your age: 35 You are eligible for voting. Enter your age: 15 You are not eligible for voting.
read -p "Enter a year: " year
if [ $((year%4)) -eq 0 ]
then
if [ $((year%100)) -eq 0 ]
then
if [ $((year%400)) -eq 0 ]
then
leap=1
else
leap=0
fi
else
leap=1
fi
else
leap=0
fi
if [ $leap -eq 1 ]
then
echo "$year is a leap year."
else
echo "$year is not a leap year."
fi
Output of the above program
Enter a year: 1990 1990 is not a leap year. Enter your age: 2004 2004 is a leap year.
