Example 1: If statement in bash on string equality #!/bin/bash read-p"Enter a match word: "USER_INPUT if[[$USER_INPUT=="hello"]];then echo"Hello to you as well" fi In this example above we use the basicIFcondition with a single test of string equality and then print some output...
case "$string" in "$pattern" ) echo "found";; esac Run Code Online (Sandbox Code Playgroud) 小智 15 以下脚本逐行从名为"testonthis"的文件中读取,然后将每行与一个简单的字符串,一个带有特殊字符的字符串和一个正则表达式(如果它不匹配)进行比较,那么脚本将打印该行而不是. bash中的空间非常重要...
1 # Correct string equality test with a bash if statement [me@linux ~]$ if [[ $myString1 == "$myString2" ]]; then echo "\$myString1 equals to \$myString2 with the string: $myString1"; else echo "\$myString1 and \$myString2 are different with \$myString1=$myString1 and...
let's take a look at the "if" statement used above. In it, we have a boolean expression. In bash, the "=" comparison operator checks for string equality. In bash, all boolean expressions are enclosed in square brackets. But what does the boolean expression actually test for?
string1="MyString" string2="MyString" if [ "$string1" == "$string2" ] then echo "Equal Strings" else echo "Strings not equal" fi 💡 Pay Attention to the spaces There must be a space between the[and the variable name and the equality operator==. If you miss any of the spaces...
test "this string" = "that string" test 1 = 001 test 1 -eq 001 In each case, we usetheechocommandto print the return code of the last command. Zero means true, one means false. Using the equals sign "=" gives us a false response comparing 1 to 001. That's correct, because the...
When the `=~'operator is used, the string to the right of the operatoris matched as a regular expression. The&& and || operatorsdonot evaluate EXPR2ifEXPR1 is sufficient to determine the expression's value.Exit Status:0or1depending on value of EXPRESSION. ...
$ bash string_combine.sh Go to top Get substring of String: Like other programming language, bash has no built-in function to cut value from any string data. But you can do the task of substring in another way in bash that is shown in the following script. To test the script, create...
have a boolean expression. In bash, the "=" comparison operator checks for string equality. In bash, all boolean expressions are enclosed in square brackets. But what does the boolean expression actually test for? Let's take a look at the left side. According ...
string1 = string2 and string1 == string2 - The equality operator returns true if the operands are equal. Use the = operator with the test [ command. Use the == operator with the [[ command for pattern matching. string1 != string2 - The inequality operator returns true if the operands...