Use elif (else if) statement Here's a script that checks whether the given number is positive or negative. In mathematics, 0 is neither positive nor negative. This script keeps that fact in check as well. #!/bin/bash read -p "Enter the number: " num if [ $num -lt 0 ]; then ec...
If statement and else statement could be nested in bash. The keyword “fi” indicates the end of the inner if statement and all if statement should end with the keyword “fi”. The “if then elif then else fi” example mentioned in above can be converted to the nested if as shown belo...
/bin/bash3#testing a bad command4ifIamNotaCommand5then6echo"it worked"7fi89echo"we are outside thie if statement"10$chmoda+xif-then2.sh11$ ./if-then2.sh12./if-then2.sh: line3: IamNotaCommand: command not found13we are outside thieifstatement14$ 在这个例子中,我们在if语句行故意...
问如何使用bash将if then语句添加到具有多个参数的值EN日志文件是包含系统本身已记录的一组记录（或事件...
/bin/bash file_path=/var/scripts/migratedb.sh if [ -e "$file_path" ]; then echo "The file exists." else echo "The file does not exist." fi If-elif-else Statement 在bash 脚本中,如果希望使用 if 语句应用多个条件,则使用 if elif else。在这种类型的条件语句中,如果满足第一个条件,则...
if 判断条件;then statement1 statement2 ... fi 双分支的if语句: if 判断条件;then statement1 statement2 ... else statement3 statement4 fi Note: if语句进行判断是否为空 [ "$name” = "" ] 等同于 [ ! "$name" ] [ -z "$name" ] Note: 使用...
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...
elif [ $num -gt 0 ]; then echo "Number $num is positive" else echo "Number $num is zero" fi 让我运行它来涵盖这里的所有三种情况: Running a script with bash elif statement 用逻辑运算符组合多个条件 到目前为止,一切都很好。但是你是否知道通过使用与(&&)、或(||)等逻辑运算符可以在一个条件...
Using if statement in bash The most fundamental construct in any decision-making structure is an if condition. The general syntax of a basic if statement is as follows: if [ condition ]; then your code fi Theifstatement is closed with afi(reverse of if). ...
/bin/bash echo -n “Enter a number 1 < x < 10: " read num if [ “$num” -lt 10 ]; then if [ “$num” -gt 1 ]; then echo “$num*$num=$(($num*$num))” else echo “Wrong insertion !” fi else echo “Wrong insertion !” fi...