考虑: #!/bin/bash i=0 while [ $i -lt 4 ]; do if echo "in first if, i = $i"; false ; then echo bar else echo "in else, i = $i" i=$((i + 1)) | echo "Will tray again..." # (1) echo "after echo i = $i" i=$((i + 1)) echo "after 2nd echo i = $i...
echo "The name of this script is \"$0\"." echo "The name of this script is \"`basename $0`\"." echo if [ -n "$1" ] # 测试变量被引用. then echo "Parameter #1 is $1" # 需要引用才能够转义"#" fi if [ -n "$2" ] then echo "Parameter #2 is $2" fi if [ -n "${...
#!/bin/bash read -p "Enter the number: " num mod=$(($num%2)) if [ $mod -eq 0 ]; then echo "Number $num is even" else echo "Number $num is odd" fi 1. 2. 3. 4. 5. 6. 7. 8. 让我们用相同的数字再次运行它: Running a bash script that checks odd even number 正如你...
(3) 如果参数为“stop”,则删除空文件/var/lock/subsys/script.sh,并显示“stopping script.sh successfully.”; (4) 如果参数为“restart”,则删除空文件/var/lock/subsys/script.sh,并显示“stopping script.sh successfully.”;而后重新创建之,并显示“restarting script.sh successfully.”; (5) 如果参数为...
if 条件1; then 分支1; elif 条件2; then 分支2; elif 条件3; then 分支3; ... else 分支n; fi bash中如何做测试: test:比较表达式,测试运算.任何命令的执行结果也可以做测试对于命令状态返回值0为真,其余都为假 格式有三种:test EXPRESSION
问bash脚本中的If / Else语句问题EN<c:choose> <c:when test="${requestScope.newFlag== '1'...
a=10b=20if[$a-eq$b];thenecho'a is equal to b'elif[$a-gt$b];thenecho'a is greater than b'elseecho'a is less than b'fi# Output:# 'a is less than b' Bash Copy In this example, we have two variables, ‘a’ and ‘b’. The script checks if ‘a’ is equal to ‘b’....
Q. How do I use the if-elif-else statement in a bash script to handle multiple conditions? Theif-elif-elsestatement in Bash allows you to handle multiple conditions sequentially, as in the example below. if [ condition1 ]; then
if [ $num -lt 0 ]; then echo "Number $num is negative" elif [ $num -gt 0 ]; then echo "Number $num is positive" else echo "Number $num is zero" fi 让我运行它来涵盖这里的所有三种情况: Running a script with bash elif statement ...
then echo "numberTwelve variable is greater than 12" else echo "neither of the statemens matched" fi 输出如下: [zexcon@fedora ~]$ ./learnToScript.sh numberTwelve variable is equal to 12 你所看到的是if语句的第一行,它在检查变量的值是否真的等于12。如果是的话,语句就会停止,并发出numberTwelv...