string2="" if [ -z "$string1" ] then echo "Null Strings" fi if [ -z "$string2" ] then echo "Empty Strings" fi Bash 脚本中的单方括号和双方括号 我们还可以在if语句中使用双方括号: if [[ "$string1" == "My String" ]] 单个方括号是老版本的 POSIX 约定的写法,现在看起来它有一些毛...
String comparison includes comparing the value of two strings - their length or sequence of characters. Compare strings when checking for certain conditions before proceeding to the next step of the script. This tutorial will teach you how to compare strings using a Bash script. Prerequisites A sy...
The following scripts compare two strings lexicographically: #!/bin/bashVAR1="Linuxize"VAR2="Ubuntu"if[["$VAR1">"$VAR2"]];thenecho"${VAR1}is lexicographically greater then${VAR2}."elif[["$VAR1"<"$VAR2"]];thenecho"${VAR2}is lexicographically greater than${VAR1}."elseecho"Strings ...
/bin/bashread-p"Enter first string: "VAR1read-p"Enter second string: "VAR2if[["$VAR1"=="$VAR2"]];thenecho"Strings are equal."elseecho"Strings are not equal."fi 您还可以使用逻辑和&&和或||比较字符串: [["string1"=="string2"]]&&echo"Equal"||echo"Not equal" 如果你需要检查字符...
Comparison Operators Comparison operators are used in bash to compare two strings to check if they are equal or not. Here, we will list some comparison operators including, string, and integer operators. Integer Operators Regular Expressions
file f1 is newer than f2. f1 -ot f2 file f1 is older than f2 Comparison Operators Comparison operators are used in bash to compare two strings to check if they are equal or not. Here, we will list some comparison operators including, string, and integer operators. Integer Operators Operat...
if [[ $string2 = *"Bash"* ]] then printf "Contains word 'Bash'. \n" else printf "Does not contain the word. \n" fi 如何把for语句放在一行里执行? #!/bin/bash # For statement in multiple lines for((i=1;i<10;i+=2))
Here is how you compare strings in Bash. if [ "$string1" == "$string2" ] You can also use a string directly instead of using a variable. if [ "$string1" == "This is my string" ] Let me show it to you with proper examples. ...
As the strings in the above script hold a different value, it gave me output saying "str1 is not equal to str2.": 2. The != (not equal to) operator The != operator in bash is used to compare two strings and determine if two strings are not equal. For example, here, I used...
f1 -nt f2 file f1 is newer than f2. f1 -ot f2 file f1 is older than f2 Comparison Operators Comparison operators are used in bash to compare two strings to check if they are equal or not. Here, we will list some comparison operators including, string, and integer operators. Integer ...