当我们运行这个脚本时,如果小于 150,它将打印数字。 If-statement-Bash-Script-Example if-else Statement 除了普通的 if 语句之外,我们还可以用 else 块扩展 if 语句。基本思想是,如果语句为真,则执行 if 块。如果语句为假,则执行 else 块。 Syntax : if [ condition_command ] then command1 command2 ……...
在 Shell 脚本中，if 语句后面加不加分号都是可以的。分号在 Shell 中是一种命令分隔符，它用于分隔...
shell if-statement 我对shell脚本非常陌生。基本上我的小程序需要两个输入:一个数字和一个数学运算符,然后打印出一个数字和运算符的数学表(1+2=3,2+2=4等等) 程序运行良好,直到我到达:elif [[ $op == * ]]即使我输入的运算符是除法运算符(/)或求幂运算符(^),该语句的计算结果也是true。感谢您的帮助...
Syntax of Expression in C Shell's 'if' Statement Question: I am required to create a C Shell script for my job, but I am unsure why my if statement is considered to be malformed. My current code resembles the following format: #!/bin/csh -f foreach line("`cat file.txt`") set c...
This is denoted as statement2 in the function syntax. An important thing to keep in mind is that, like C programming, shell scripting is case sensitive. Hence, you need to be careful while using the keywords in your code. How to use if-else in shell script It is easy to see the ...
In this example, the script first checks if ‘a’ is greater than ‘b’. If it’s not, it moves on to the ‘elif’ statement to check if ‘a’ is greater than ‘c’. If neither condition is met, it executes the ‘else’ statement, which in this case, prints ‘a is not greate...
A nested if statement is an if statement inside a clause of another if statement. Nothing prevents multiple levels of if statement in a shell script and in Bash. if first-test-commands; then if second-level-test-commands; then consequent-commands; else second-level-alternate-consequents; [eli...
for变量名in取值列表do命令 done 语法二: for ((expr1;expr2;expr3));do 命令列表 done 实例: #提前准备好用户的文件[root@VM_0_10_centos shellScript]#vi username.txttest01 test02 test03 test04 test05 test06#vi example.sh#!/bin/bashread -p"请输入用户密码:"PASSWDforUNAMEin`cat username....
Shell脚本-数字检查和if语句问题 我对这里和编码界都比较陌生。我现在正在上一门Shell脚本的课程,我有点卡住了。 我试图做一点额外的工作,让脚本检查命令行参数,如果没有或只有1,提示用户输入缺少的值。 在大多数情况下,我已经能够得到它的大部分工作,除了当涉及到数字检查部分。我不完全确定是否正确地执行了嵌套...
PowerShell $condition=$trueif($condition) {Write-Output"The condition was true"} The first thing theifstatement does is evaluate the expression in parentheses. If it evaluates to$true, then it executes thescriptblockin the braces. If the value was$false, then it would skip over that script...