'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 power
1、if语法格式1.1 if格式if condition; then commands; fi1.2 else if 和 elseif condition...
Now we know what is an if-else function and why is it important for any programmer, regardless of their domain. To understand if-else in shell scripts, we need to break down the working of the conditional function. Let us have a look at the syntax of the if-else condition block. if[...
#!/bin/bashread-p"请输入您的名字: "nameif["$name"!=""];thenecho"您的名字是:$name"exit0...
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. ...
syntax error near unexpected token fi 等都是这样引起的. 5 if 后面一定要跟上 then. 同理 elif 后面一定要跟上 then. 不然提示出错信息: syntax error near unexpected token else top BASH IF http://lhsblog01.blog.163.com/blog/static/10200451920081118105937818/ ...
nesting if statements provide even greater flexibility and precision in your conditional logic. Mastering the Bash if statement is essential for effective scripting in Unix-based operating systems. By understanding its syntax, conditionals, and examples, you can create robust scripts that adapt to diffe...
Notice that the if statement ends with the reserved word fi. This is not a mistake and is required by Bash syntax.Let's say we want to add a catchall using else. If the then command block of the if statement is not satisfied, then the else will be executed:...
/bin/bash platform=$1 if[ "$platform" = "ibmaix64" ] then echo "$platform" else echo "hello ooo" fi Error : syntax error near unexpected token `then' 原因: 条件语句 [ 符号的两边都要留空格 if[ $platform = "winx64" ]---right 绿色标记为空格 if[ $platform = "winx64" ...
Following is the syntax of OR logical operator in Bash scripting. </> Copy operand_1 || operand_2 where operand_1 and operand_2 are logical expressions or boolean conditions that return either true or false. || is the operator used for AND boolean operation. ...