The above format is used to get the length of the given bash variable. $catlen.sh#! /bin/bash var="Welcome to the geekstuff"echo${#var} $ ./len.sh24 To understand more about bash variables, read6 Practical Bash Global and Local Variable Examples. 2. Extract a Substring from a Vari...
的方法是通过使用引号来包裹字符串。具体来说,可以使用单引号、双引号或反引号来实现。 1. 单引号:使用单引号将字符串包裹起来,变量将被直接赋值为整个字符串,保留字符串中的空格。例如: ``` str...
The above format is used to get the length of the given bash variable. $ cat len.sh #! /bin/bash var="Welcome to the geekstuff" echo ${#var} $ ./len.sh 24 To understand more about bash variables, read6 Practical Bash Global and Local Variable Examples. 2. Extract a Substring fro...
Get the length of variable var="some string" echo ${#var} # 11 Get the first character of the variable var=string echo "${var:0:1}" #s # or echo ${var%%"${var#?}"} Remove the first or last string from variable var="some string" echo ${var:2} #me string Replacement (e....
你可以这样使用它：## declare an array variabledeclare&...
Among them, length gives you the length of a string. abhishek@handbook:~$ expr length "my string" 9 Since the expr command outputs the length, you should store it in a variable using command substitution. #!/bin/bash str="my string" length=$(expr length "$str") echo "Length of my...
If no "return xxx" in function, return the result of last command. Two ways to get the return value: foo i=$? foo() { echo 3 } i=`foo` Use keyword "local" to define a local variable in function. Otherwise, the varibale in function is global. Use keyword "exit" in function wi...
Get the length of variable var="some string" echo ${#var} # 11 Get the first character of the variable var=string echo "${var:0:1}" #s # or echo ${var%%"${var#?}"} Remove the first or last string from variable var="some string" echo ${var:2} #me string Replacement (e....
forvariable in listdocommand1 command2 ...done 例如,以下脚本将打印 1 到 5: fori in{1..5}doecho$idone 以下是while循环的基本语法: while[condition]docommand1 command2 ...done 例如,以下脚本将打印 1 到 5: i=1while[$i-le5]doecho$i((i++))done ...
Use the # Operator to Calculate String Length in BashWe can use the # operator to calculate the length of the string. The following code shows the syntax to get the length of a string using the # operator.${#your_var} First, we wrapped the variable containing the string with the ...