/bin/bash -xi=$1 #变量i的值取第1个参数的值iftest $i-gt89;then #如果i>89echo'A'elif test $i-gt79;then #如果i>79echo'B'elif test $i-eq60-o $i-gt60;then #如果i=60或i>60(即:i>=60) echo'C'elif test $i-gt0;then #如果i>0echo'D'elif
exit 0 1 2 ~ script % ./if.sh 109 greater than 11 -eq:equal 等于-lt:less than 小于-gt:greater than 大于-le:less than or equal 小于或等于-ge:greater than or equal 大于或等于 为什么不可以用<,>等来表达上面这些关系,因为这些符号在类Unix系统中有特殊用途。Jack...
= STRIN2 # Trueifstrings arenotequal#算术测试操作var1 -eq var2 # Trueifvar1 is equal to var2var1 -ne var2 # Trueifvar1notequal to var2var1 -lt var2 # Trueifvar1 is less than var2var1 -le var2 # Trueifvar1 is less thanorequal ...
In this script, after attempting to pull changes from a Git repository, we check the exit code. If it is not equal to 0 (indicating failure), we print an error message and exit the script with a status of 1. If the command is successful, we print a success message. This method allo...
num2=$[1+5]iftest$[num1] -eq $[num2]thenecho'Two numbers are equal!'elseecho'The two numbers are not equal!'fi 循环语句 forloopin1 2 3 4 5doecho"The value is:$loop"doneforstrinThis is a stringdoecho$strdone 以下使用了 Bash let 命令,它用于执行一个或多个表达式,变量计算中不需...
if[[$USER='username']];thenecho"true"elseecho"false"fi not equal:!= numeric equality:-eq not equals:-ne is empty:-z if[[1-eq1]];if[[-z$USER]]; Elif if[[-z$USER]];thenecho"user is empty"elif[[1-eq1]];thenecho"1==1"elseecho"false"fi ...
Code:#!/bin/bash # File to check file_to_check="temp.txt" # Check if file exists if [ -e "$file_to_check" ]; then echo "File exists" exit 0 # Exit with code 0 indicating success else echo "File not found" exit 1 # Exit with code 1 indicating failure fi CopyOutput:...
if [ $? -eq 0 ]; then ... else ... fi: This construct checks the exit status of the previous command. If the exit status is 0 (indicating success), it prints a success message; otherwise, it prints a failure message. 6.
How to check if a string is in an array? How to use the Bash ternary operator? How to negate an if condition in a Bash if statement? (if not command or if not equal) How to use the BASH_REMATCH variable with the Regular Expression Operator =~?
I have a problem. This is my script: The problem is here I want to only check if POP42 is in the file in the second column and print 5 but I have data like that so it will print into my output file ${... PHP generated salt in SQL-Database doesn't equal when retrieved from ...