Bash supports if-else statements so that you can use logical reasoning in your shell scripts. The generic if-else syntax is like this: if [ expression ]; then ## execute this block if condition is true else go to next elif [ expression ]; then ## execute this block if condition is ...
General Syntax of Bash IF ELIF ELSE Below is the general syntax ofIFELIFandELSEin bash: ifCONDITION-TO-TEST;then CODE-TO-EXECUTE-1 elifNEXT-CONDITION-TO-TEST;then CODE-TO-EXECUTE-2 elifNEXT-CONDITION-TO-TEST;then CODE-TO-EXECUTE-2 ...
if [ condition ]; then if true, execute this block 120 < $1 && echo "$1 is less than 150"fi if-else 语句则允许根据条件执行不同的代码块：Syntax:if [ condition ]; then if true, execute this block else if condition is false, execute this block fi 更复杂的 if-elif-else...
As we know, the general syntax for theif ... elsein Bash is: if[YOUR_CONDITION_HERE]then// Block of code when the condition matcheselse// Default block of codefi Now before we go to the single-line format of anif ... elsestatement, we need to understand the multiline format of ...
Bash if-else statement You can utilize an if-else statement in a Bash script to execute any statement if the specified condition is evaluated as false. Check out the syntax of the if-else statement: if (condition) then if block statements else else block statements fi To add an if-else ...
/bin/bash if [ $(whoami) = 'root' ]; then echo "You are root" fi Thewhoamicommand outputs the username. From thebash variables tutorial, you know that$(command)syntax is used forcommand substitutionand it gives you the output of the command....
'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...
bash 脚本中使用 if 语句。在 bash shell 脚本中，If 语句可以以 If、If- else、If- If- else、...
So, if you want to execute some statements when the if condition fails. The general syntax of this statement is: if [ CONDITIONAL-COMMAND ] then STATEMENTS else STATEMENTS fi Let's understand by an example. Example: if else in bash
If statement and else statement could be nested in bash. The keyword “fi” indicates the end of the inner if statement and all if statement should end with the keyword “fi”. The “if then elif then else fi” example mentioned in above can be converted to the nested if as shown belo...