if-statement-bash-scripting-example Nested if Statement If 语句和 else 语句可以嵌套在 bash 脚本中。关键字 fi 显示了内部 if 语句的结束，所有 if 语句都应该以关键字 fi 结束。Syntax :if [ condition_command ] then command1 command2 …
if else语句 如果有两个分支，就可以使用 if else 语句，它的格式为：ifconditionthenstatement1elsestat...
'Else if'in bash scripting, often written as'elif', is used to check multiple conditions in your code. It is used with the syntax,if [firstStatement]; then... elif [secondCondition]; then... else. It’s a powerful tool that allows your scripts to make decisions based on various scen...
Scripting 1. Introduction As the ubiquitous Linux shell,Bashhas its own features and scripting syntax, which upgrade those of the regularshshell. On the other hand, most shells agree on how the basicconditional expressionswork at the logical and syntactic levels. ...
This is called an if compound command, which we will cover fully when we get to shellscripting in Part 5, but for now we will translate: 这叫做一个 if 复合命令,我们将会在第五部分详细地介绍它,现在我们对它翻译一下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 If the file ~/.bash...
# Start of script $x = 2; $y = 3 Get-Power $x $y # Function defined in script function Get-Power([int]$x, [int]$y) { if ($y -gt 0) { return $x * (Get-Power $x (--$y)) } else { return 1 } } # End of script 在脚本中创建的变量 $x 和$y 的范围是该脚本的...
Syntax: exit status-code File test options The -e option return true if a given file/directory exists. Script to test if a file exists in the current working directory: read -p "enter file name to test" name if [ -e $name ] echo "exists" else echo "does not exist" fi The ...
Syntax 复制 parenthesized-expression: ( new-lines~opt~ pipeline new-lines~opt~ ) 描述:括号表达式是一个 主表达式 其类型和值与没有括号的表达式的类型和值相同。 如果表达式指定变量,则括号表达式指定相同的变量。 例如,$x.m 和($x).m 等效。
8.3 if 语句 语法: Syntax 复制 if-statement: if new-lines~opt~ ( new-lines~opt~ pipeline new-lines~opt~ ) statement-block elseif-clauses~opt~ else-clause~opt~ elseif-clauses: elseif-clause elseif-clauses elseif-clause elseif-clause: new-lines~opt~ elseif new-lines~opt~ ( new-...