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 of two bash strings. In the example below, two strings are defined: strng1 and strng2. Also, ...
For comparison, you can also use ‘-eq’ for equality, ‘-ne’ for not equality and ‘-gt’ for greater than in bash script. #!/bin/bash n=10 if [ $n -lt 10 ]; then echo "It is a one digit number" else echo "It is a two digit number" fi Run the file with bash ...
若 break 后面指定一个数值 n 的话,则"从里向外"打断第 n 个循环,默认值为 break1,也就是打断当前的循环。 在使用 break 时需要注意的是,它与 return 及 exit 是不同的:*break 是结束 loop* return 是结束function* exit 是结束 script/shell 而continue 则与 break 相反:强迫进入下一次循环动作。若你...
若 break 后面指定一个数值 n 的话,则"从里向外"打断第 n 个循环,默认值为 break1,也就是打断当前的循环。 在使用 break 时需要注意的是,它与 return 及 exit 是不同的:*break 是结束 loop* return 是结束function* exit 是结束 script/shell 而continue 则与 break 相反:强迫进入下一次循环动作。若你...
“not” operator to check the condition of whether the two integer variable values are equal or not. For checking their equality, we have been using the “-eq” operator of Bash within the condition clause. If the two values are equal and the “-eq” operator returns “true”, the “!
How to do string comparison and check if a string equals to a value? When using [[, the == operator can be used to test strings equality in Bash. Remember that the [[...]] compound command will perform pattern matching where the right-hand side can be a glob pattern. Hence, to pr...
The following script uses the if statement and the test [ command to check if the strings are equal or not with the = operator: #!/bin/bash VAR1="Linuxize" VAR2="Linuxize" if [ "$VAR1" = "$VAR2" ]; then echo "Strings are equal." else echo "Strings are not equal." fi ...
There must be a space between the[and the variable name and the equality operator==. If you miss any of the spaces here, you’ll see an error like ‘unary operator expected’ or missing]. Example 2: Check if strings are not equal in Bash ...
if statements in bash script use square brackets for the logical condition and also have support for else and elif (else if) branches. Bash supports standard programming language conditional operators such as equals (==), not equals (!=), less than and greater than (<, >), and a number...
0 Expands to the name of the shell or shell script. This is set at shell initializa‐ tion. If bash is invoked with a file of commands, $0 is set to the name of that file. If bash is started with the -c option, then $0 is set to the first argument...