'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...
但它返回了：1. if 在shell中语法格式1.1 if-elif-else语法格式if [ command ];thenelif [ comman...
if 先来个实例： x=5; if [ $x = 5 ]; then echo 'x equals 5.'; else echo ...
How to use an If Statement with Then, Else, Else If (elif) clauses? Using a Bash If Statement with Conditional Expressions Using a Bash If Statement with multiple conditions Using Nested If Statements Common Pitfalls and Errors Incorrect usage of the single bracket command [ How to solve the...
else echo "The number is zero." fi chmod +x example.sh Case The case statement is used to execute commands based on multiple conditions. case value in pattern1) commands1 ;; pattern2) commands2 ;; *) default_commands ;; esac Example #!/bin/zsh echo "Enter a letter: " read lett...
if [ -f "$file_path" ] then echo "File exists." else echo "File does not exist." fi Compound Condition You can combine multiple conditions using logical operators like && (AND) and || (OR). Here’s an example: !/bin/bash
else echo "You entered: $1, not what I was looking for." fi Now let’s run it a few times: bashnested.sh 2bashnested.sh 4bashnested.sh 6 ## You entered: 2, not what I was looking for. ## four ## six In order to get to the inner IF statement, the conditions for the out...
if [ $i -eq 4 ] then break fi echo $i done Bash while Loop Iterate through an Array An array stores multiple elements of the same data type. Loop structures serve as a fundamental tool for iterating through arrays and performing operations on each of their elements. ...
if[$status-ne0];thensleep_time=$(((RANDOM%60)+1))echo"WARNING: Copy failed for$server:$REMOTE_FILE. Waiting '${sleep_time}seconds' before re-trying..."/usr/bin/sleep${sleep_time}selsebreak# All good, no point on waiting...fi((now=now+1))donereturn$status}DATADIR="$HOME/...
z Like SPACE, but if N is specified, it becomes the new window size. ESC-SPACE Like SPACE, but scrolls a full screenful, even if it reaches end-of-file in the process. ENTER or RETURN or ^N or e or ^E or j or ^J Scroll forward N lines, default 1. The entire N lines are...