In double parenthesis, we also use the!=operator to compare numbers if they are not equal. The operator compares the left operand and the right operand. The expression evaluates to true or false: #!/bin/bash # Script for not equal to numeric comparison x=2 y=1 if (( $x != $y )...
Use Square Braces[]to Compare Numbers in Bash The comparison operators must be used within the square braces. x=4 y=3if[$x-eq$y];thenecho$xand$yare equalelif[$x-gt$y]thenecho$xis greater than$yelseecho$xislessthan$yfi Output: ...
So far, you've learned how to run a script from the command line prefixed with thebashinterpreter. However, if you want to run the script by name alone, it won't work. Try to run the file simply by typing the name of the file and pressing enter. Note that we're prefixing the f...
You have seen the one-liners of the test command so far. You can also use the test condition with theif-else condition in the bash scripts. Let me share a simple example of comparing two numberspassed as arguments to the shell script: #!/bin/bash ## Check if the numbers are equal ...
echo "Try running this script as root." fi if [ $@ -z ] then echo "You did not provide any parameters." else echo "You did provide these parameters: $@" fi # you can compare two strings with the following operators: # = or == Is Equal To # != Is Not Equal To # > Is Gr...
Likewise, we can compare strings. Note thatfooandbarare holding strings now, instead of numbers: foo=Hello bar=Worldif[[$foo!=$bar]]thenecho"The strings are not equal"fiCopy After execution, we’ll see the following output: The strings are not equalCopy ...
1. bash -n /PATH/TO/SOME_SCRIPT 检测脚本有无语法错误 2. bash -x /PATH/TO/SOME_SCRIPT 调试执行 1. 2. 3. 4. 一个简单的shell脚本: #!/bin/bash #author: liansir #Version: 1.0 #Description: display a Hello World! echo "Hello World!" ...
In my last article I had shared some samples script examplesto compare decimal values and floating numbers by converting them into integerwhich can work well for some scenarios but would not be the best solution for this one. Recently I came into a situation where I was supposed to install ...
1. bash -n /PATH/TO/SOME_SCRIPT 检测脚本有无语法错误 2. bash -x /PATH/TO/SOME_SCRIPT 调试执行 一个简单的shell脚本: #!/bin/bash #author: liansir #Version: 1.0 #Description: display a Hello World! echo "Hello World!" 变量与赋值 ...
=" operator to compare both variables. If the condition is met, the "then" part's echo statement will be executed. Otherwise, the "else" statement's echo part will be executed. After executing the test.sh shell script in the command-line interface, the initial echo statement "Names are ...