Checking the exit status of a command or script is an important part of Bash scripting and using an ‘if’ statement along with the ‘$?’ variable is a simple and effective way to check the exit status. By mastering this technique, we can easily determine the success or failure of a ...
Use if else statement Now I add an else statement in the previous script. This way when you get a non-zero modulus (as odd numbers are not divided by 2), it will enter the else block. #!/bin/bash read -p "Enter the number: " num mod=$(($num%2)) if [ $mod -eq 0 ]; t...
if-statement-bash-scripting-example Nested if Statement If 语句和 else 语句可以嵌套在 bash 脚本中。关键字 fi 显示了内部 if 语句的结束,所有 if 语句都应该以关键字 fi 结束。 Syntax : if [ condition_command ] then command1 command2 …….. last_command else if [ condition_command2 ] then c...
它的基本格式如下：caseexpression in pattern1)statement1;;pattern2)statement2;;pattern3)statemen...
'Else if'in bash scripting, often written as'elif', is used to check multiple conditions in your code. It is used with the syntax,if [firstStatement]; then... elif [secondCondition]; then... else. It’s a powerful tool that allows your scripts to make decisions based on various scen...
Bash, short for "Bourne Again SHell," is a powerful scripting language used in Unix-based operating systems. One of the fundamental constructs in Bash programming is the if statement. The if statement allows you to control the flow of your script based on specific conditions. In this article...
/bin/bash echo -n “Enter a number 1 < x < 10: " read num if [ “$num” -lt 10 ]; then if [ “$num” -gt 1 ]; then echo “$num*$num=$(($num*$num))” else echo “Wrong insertion !” fi else echo “Wrong insertion !” fi...
以下是一些Bash 4+示例: 示例1,在字符串中检查是否存在'yes'(不区分大小写): if [[ "${str,,}" == *"yes"* ]] ;then 示例2,检查字符串中是否包含“yes”(不区分大小写): if [[ "$(echo "$str" | tr '[:upper:]' '[:lower:]')" == *"yes"* ]] ;then 示例三,检查字符串中是...
问如何在bash脚本中使用if语句EN#前言：在生产工作中if条件语句是最常使用的，如使用来判断服务状态，...
linuxhint@:~$basht6.sh Enter a number:14 Valid2digit number entered linuxhint@:~$basht6.sh Enter a number:101 linuxhint@:~$ Example 7: If Else Statement in Bash Scripting We will now demonstrate theELSEcondition. TheELSEcondition is used in the case where theIFcondition or all theELIF...