2 if语句 if ($a < 0) then # 括号内外允许有空格, 比bash好点 echo "$a < 0" else if ($a < 10) then echo "$a < 10" else echo "$a >= 10" endif if ($1 == "") then # 注意==两边要加空格, 不然可能会报告"if: Expression Syntax" set name = $1 endif 3 foreach语句 set...
if ($var > 10) then echo "Variable is greater than 10" else if ($var < 5) then echo "Variable is less than 5" else echo "Variable is between 5 and 10" endif 正确示例: 代码语言:txt 复制 if ($var > 10) then echo "Variable is greater than 10" else if ($var < 5) then ec...
# 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 grep $1 somefile else echo "Grievous error! Database file does not exist". endif #for...
#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 grep $1 somefile else echo"Grievous error! Database file does not exist". endi...
if( $# != 1 || $1 != "first" && $1 != "second" ) then echo "Error: Usage: $0 [first|second]" exit 1 endif The code you provided is suitable for shells similar to Bourne, such assh,bash, and so on. Linux - C Shell: "if: Expression Syntax", I have to write a C Shel...
csh脚本语法实例csh实例参考：复制代码代码如下:#!/bin/csh -vx #csh -vx show the command before running to help debug #just to check syntax #csh -n $0 #argv if ($#argv < 2) then echo "Sorry, but you entered too few parameters"echo "usage: $0 arg1 arg2 exit endif set arg1 = $...
If you want to get at the status directly, use the value of the status variable rather than this expression). Control Flow The shell contains a number of commands to regulate the flow of control in scripts and within limits, from the terminal. These commands operate by forcing the shell ...
1） 变量 通过set来定义局部变量x,通过$x或${x}来使⽤变量x的值，$%x表⽰变量的值的长度, $?x来判断变量x是否设置，如设置则为1，否则为0。set x = 5 echo $x echo ${x}kg echo $%x 全局变量的定义setenv v value 该变量将被此shell派⽣的所有⼦shell继承。$$表⽰当前进程的PID， $...
Syntax: while (expression)commandsend Example: #!/bin/cshset word = "anything"while ($word != "")echo -n "Enter a word to check (Return to exit): "set word = $<if ($word != "") grep $word /usr/share/dict/wordsend
if (expr )command If the specified expression evaluates to true, the single command with arguments is executed. Variable substitution on command happens early, at the same time it does for the rest of the if command. command must be a simple command, not a pipeline, a command list, or ...