我尝试使用&&and||运算符,但似乎我犯了一些错误,因为我习惯在 Bash 上工作。Mar*_*oij 5 首先,你的语法是错误的: 您需要分配变量set ?..:不是csh 中的运算符。 “正常”的csh if声明如下: if ( cond ) then foo else bar endif Run Code Online (Sandbox Code Playgroud) 你实际上可以缩短if到 ...
1. if 语法如下 if (expression) simple-command 2. goto 语法如下 goto label 这时程式会跳至以l”label:”开头的那一行执行 if ($#argv == 2) goto goodargs echo …Please use two arguments.? exit goodrags: … 3. if then else 这和Bourne Shell的if then, if then else, if then elif 相似...
if (expression) simple-command 2. goto 语法如下 goto label 这时程式会跳至以l”label:”开头的那一行执行 if ($#argv == 2) goto goodargs echo ‘Please use two arguments.’ exit goodrags: … 3. if then else 这和Bourne Shell的if then, if then else, if then elif 相似。语法如下 A. i...
-w file file is writable by user -x file file is executable by user -o file file is owned by user -z file file has size 0 -f file file is an ordinary file -d file file is a directory ! -- negate && -- logical and || -- logical or #if-else # run cmd as if expression ...
在编程时，实际上是在定义要由计算机执行的 过程(procedure)或 例程(routine)。一个简单的类比是将...
&& -- logical and || -- logical or #if-else # run cmd as if expression if ({grep -s junk $1}) then echo"We found junk in file $1" endif # check if the var is defined if ($?dirname) then ls $dirname endif if (-e somefile) then ...
if ($var > 10) then echo "Variable is greater than 10" else if ($var < 5) then echo "Variable is less than 5" else echo "Variable is between 5 and 10" endif 解释: 确保逻辑条件正确,避免遗漏或重复的条件。 示例代码 以下是一个完整的示例,展示了如何在C shell中正确使用if语句: 代码语...
1.if / then / else if (expr) thencommandselse if (expr2) thencommandselsecommandsendifExample:#!/bin/cshif ($#argv == 0) thenecho "No number to classify"else if ($#argv > 0) thenset number = $argv[1]if ($number < 0) then@ class = 0else if (0 <= $number && $number ...
foreach、switch、while、if. . .then 和else 内置命令的每个实例都必须作为其自己的输入行上的第一个词。如果shell 的输入查找不到并且当前在读取某个循环,将缓存该输入。Shell 将在内部缓冲区中执行查找以完成该循环所指示的重新读取。(在此缓存输入允许的范围内,可以对之前查找不到的输入继续执行后向 ...
&& -- logical and || -- logical or #if-else # run cmd as if expression if ({grep -s junk $1}) then echo "We found junk in file $1" endif # check if the var is defined if ($?dirname) then ls $dirname endif if (-e somefile) then ...