计算字符串长度的另一种方法是使用带有'length'关键字的`expr`命令。在此示例中,我们使用了`expr length“ $ str”`来查找字符串的长度。 Bash脚本 #!/bin/bash#Bash script to find the length of a stringstr="Welcome to Javatpoint"length=`expr length"$str"` echo"Length of '$str' is $length"...
How to Find Length of String in Bash [Quick Tip] If you are dealing with strings in bash, you may need to know the length of string. Thankfully, getting length of string in bash is super simple. Let's say you have a string named my_string. Its length can be extracted as: ${#...
${string:position:length} Extract $length of characters substring from $string starting from $position. In the below example, first echo statement returns the substring starting from 15th position. Second echo statement returns the 4 characters starting from 15th position. Length must be the number ...
${string:position:length} Extract $length of characters substring from $string starting from $position. In the below example, first echo statement returns the substring starting from 15th position. Second echo statement returns the 4 characters starting from 15th position. Length must be the number ...
1. Identify String Length inside Bash Shell Script ${#string} 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
${array[@]:position:length}的语法可以提取数组成员。$ food=( apples bananas cucumbers dates eggs fajitas grapes ) $ echo ${food[@]:1:1} bananas $ echo ${food[@]:1:3} bananas cucumbers dates上面例子中,${food[@]:1:1}返回从数组1号位置开始的1个成员,${food[@]:1:3}返回从1号位置...
To find the length of the string you can use the#symbol. Finding the length of the string will be useful in some cases where you have to write some logic based on the number of strings. $ echo "${#SITE_NAME}" Length of the string ...
string1=string2 string1 等於 string2 string1!=string2 string1 不等於 string2 int1 -gt int2 int1 大於 int2 int1 -ge int2 int1 大於等於 int2 int1 -eq int2 int1 等於 int2 int1 -ne int2 int1 不等於 int2 int1 -le int2 int1 小於等於 int2 ...
How To Bash Shell Find Out If a Variable Is Empty Or Not #!/bin/bashJAIL="/nginx"HINT=""# Do three possibilities for $JAIL ##for i in 1 2 3 docase $i in1) JAIL="/nginx/jail"; HINT="value set";;2) JAIL=""; HINT="value set to empty string";;3) unset JAIL; HINT="...
Index of last occurrence of substring in string : 15 References Bash – Reverse a string Bash – Index of substring in string Bash – String length Bash If-else Conclusion In thisBash Tutorial, we learned how to find the index of last occurrence of specific substring in given string....