Checking if two Bash script strings are equal isn’t a big thing per se, and even if the Bash script strings are not equal, that’s not also a big thing. This article explains everything you need to know about Bash string equality, plus how you can access and use Linux files on Win...
= STRIN2 # Trueifstrings arenotequal#算术测试操作var1 -eq var2 # Trueifvar1 is equal to var2var1 -ne var2 # Trueifvar1notequal to var2var1 -lt var2 # Trueifvar1 is less than var2var1 -le var2 # Trueifvar1 is less thanorequal ...
String null or not To check if two strings are equal, use==operator. Strings are case sensitive, so you have to run the comparison keeping this point in mind. $ X="Linux" $ Y="Linux" $ [[ $X == $Y ]] && echo "Equal" || echo "Not equal" String equality To check if two ...
echo "INT is not an integer." >&2 exit 1 fi只要是算术表达式,都能用于((...))语法,详见《Bash 的算术运算》一章。普通命令的逻辑运算如果if结构使用的不是test命令,而是普通命令,比如上一节的((...))算术运算,或者test命令与普通命令混用,那么可以使用 Bash 的命令控制操作符&&(AND)和||(OR),进行...
the variable X is not the empty string 为何?这是因为shell将$X展开为空字符串,表达式[-n]返回真值(因为改表达式没有提供参数)。再看这个脚本: 1 2 3 4 5 #!/bin/bash X="" if[ -n"$X"];then# -n 用来检查变量是否非空 echo"the variable X is not the empty string" ...
Example 1: Check if two strings are equal If you want to check if two strings are equal, here’s an example: #!/bin/bash string1="MyString" string2="MyString" if [ "$string1" == "$string2" ] then echo "Equal Strings" else echo "Strings not equal" fi ...
#Declare string S2 S2="Bash" if [ $S1 = $S2 ]; then echo "Both Strings are equal" else echo "Strings are NOT equal" fi 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Bash File Testing #!/bin/bash file="./file" if [ -e $file ]; then ...
Anything written after a pound sign (#) is a comment and is not executed by Bash. You can do simple arithmetic with theexprcommand. Perform more complicated arithmetic by piping a string expression intobcusingecho. 5.1.2Exercises Look at themanpages forbc. ...
-eq 两数值相等 (equal) -ne 两数值不等 (not equal) -gt n1 大于 n2 (greater than) -lt n1 小于 n2 (less than) -ge n1 大于等于 n2 (greater than or equal) -le n1 小于等于 n2 (less than or equal) 5. 判定字符串的数据 test -z string 判定字符串是否为 0 ?若 string 为空字符串,...
Bash provides several techniques for comparing strings. Equality and Inequality To check if two strings are equal, use == operator ? Open Compiler string1="Hello, world!"string2="Hello, world!"if["$string1"=="$string2"];then echo"Strings are equal"elseecho"Strings are not equal"fi ...