In this article, we will explain the string comparison in Bash using the if statement. A shell program running in Linux that provides the command line interface for users to execute different commands is called Bash shell. It is also used as a default shell in many distributions of Linux, ...
An expression can be: String comparison, Numeric comparison, File operators and Logical operators and it is represented by [expression]: Number Comparisons: -eq - is equal to - if [ "$a" -eq "$b" ] -ne - is not equal to - if [ "$a" -ne "$b" ] -gt - is greater than - ...
/bin/bash string1= string2="" if [ -z "$string1" ] then echo "Null Strings" fi if [ -z "$string2"] then echo "Empty String" fi Bonus Tip: Single bracket ‘[]’ and double bracket ‘[[]]’ in bash scripts You can also use the if statement with double brackets like this:...
TheBash case statementis a form of theif elif else conditionalstatement, simplifying complex conditions and offering multiple choices. When using the case statement, there is no need to specify the test operators for comparing strings. However, the statement only matches the string against specified ...
2. String Comparisons: ==: Equal to !=: Not equal to -z: Empty string -n: Non-empty string 3. File and Directory Checks: -e: Exists -f: Regular file -d: Directory -r: Readable -w: Writable -x: Executable Example of using If Statement: ...
statement can be used to check the different conditions in Bash. The different types of comparison operators, logical operators, and options are used with the “if” statement for testing. The uses of the “-z” and “-n” option to test the string values using the “if” statement in ...
The “if” statement is used to check Bash strings for equality. Comparison with “==” operators To check if two strings are equal in a Bash script, there are two comparison operators used. First, we’ll discuss the “==” operator. The “==” operator is used to check the equality...
/bin/bashVAR='Linuxize'if[[-n$VAR]];thenecho"String is not empty."fi Copy String is not empty.Copy Comparing Strings with the Case Operator Instead of using the test operators you can also use thecase statementto compare strings:
Use if statement in bash Let's create a script that tells you if a given number is even or not. Here's my script namedeven.sh: #!/bin/bash read -p "Enter the number: " num mod=$(($num%2)) if [ $mod -eq 0 ]; then echo "Number $num is even" fi ...
It then checks if the entered password ('$password') matches the correct password ('$correct_password') using an if statement with a string comparison ([[ ... ]]). If the passwords match, the script prints "Access granted" and exits the loop using the "break" statement. ...