If you are comparing strings, you can use these test conditions: ConditionEquivalent to true when "$a" = "$b"$a is same as $b "$a" == "$b"$a is same as $b "$a" != "$b"$a is different from $b -z "$a"$a is empty ...
/bin/bash string1= string2="" if [ -z "$string1" ] then echo "Null Strings" fi if [ -z "$string2"] then echo "Empty String" fi Bonus Tip: Single bracket ‘[]’ and double bracket ‘[[]]’ in bash scripts You can also use the if statement with double brackets like this:...
In most cases, when comparing strings you would want to check whether the strings are equal or not. The following script uses theif statementand the test[command to check if the strings are equal or not with the=operator: #!/bin/bashVAR1="Linuxize"VAR2="Linuxize"if["$VAR1"="$VAR2...
In this example, we demonstrate the usage ofif statementwith a simple scenario of comparing two strings: #!/bin/bash #ifcondition istrue if["myfile"=="myfile"]; then echo"true condition" fi #ifcondition isfalse if["myfile"=="yourfile"]; ...
Comparing Strings with Case Statements 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...
set a condition to check if the string value of variable $val is not equal to "Aqsa". If this condition is met, the first echo statement will be executed. Otherwise, the other part of the code will be executed, and the "if-else" statement will end. Note that when comparing text typ...
Theifstatement says that if something is true, then do this. But if the something is false, do that instead. The "something" can be many things, such as the value of a variable,the presence of a file, or whether two strings match. ...
Note:Learn how to compare strings using a Bash script with our guideBash string comparison. Conclusion This guide showed how to use the Bashcasestatement to simplify complex conditionals when working with multiple choices. Create different scripts to test patterns and process a command if a match ...
If you are comparing strings, you can use these test conditions: ConditionEquivalent to true when "$a" = "$b"$a is same as $b "$a" == "$b"$a is same as $b "$a" != "$b"$a is different from $b -z "$a"$a is empty ...
It is recommended to use[[ ]]in combination with an if statement instead of using[ ]when comparing integers. Furthermore, it is not recommended to use>or<; rather, use-gt,-ge,-lt, or-le. Lastly, if you plan to perform any type of mathematical comparison , it is advisable to utilize...