我们将讨论具有单个和多个条件的if语句。在转向if语句之前,让我们看看if语句中一些常用的条件运算符。 使用带有一个条件的if语句 语法: if[condition-statement];thenCommands..fi 让我们看一个使用if条件的示例 bash 脚本。 脚本: #!/bin/bashecho"Enter your marks out of 100: "readmarksif[$marks-gt100];...
问在bash中使用内联if-statement添加命令参数ENexport export命令将会使得被 export 的变量在运行的脚...
1. Bash If..then..fi statement if [ conditional expression ] then statement1 statement2 . fi This if statement is also called as simple if statement. If the given conditional expression is true, it enters and executes the statements enclosed between the keywords “then” and “fi”. If th...
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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 greater than either b or ...
bash 中的条件语句，基础就是 Test 。 if 先来个实例： x=5; if [ $x = 5 ]; then e...
Conditions of using if statement Bash provides several conditionals that you can use within if statements: 1. Numeric Comparisons: -eq: Equal to -ne: Not equal to -gt: Greater than -lt: Less than -ge: Greater than or equal to -le: Less than or equal to ...
>= - is greater than or equal to - (("$a" >= "$b")) Examples: [ n1 -eq n2 ] (true if n1 same as n2, else false) [ n1 -ge n2 ] (true if n1greater then or equal to n2, else false) [ n1 -le n2 ] (true if n1 less then or equal to n2, else false) ...
Use if statement in bash Let's create a script that tells you if a given number is even or not. Here's my script namedeven.sh: #!/bin/bash read -p "Enter the number: " num mod=$(($num%2)) if [ $mod -eq 0 ]; then ...
if Statement if...else Statement if...elif...else Statement Nested if Statements Multiple Conditions Test Operators Conclusion Share: This article will walk you through the basics of the bash if...else statement and explain you how to use it in your shell scripts. Decision-making is one ...