'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 power
清单9. 用 if、then、else 计算表达式 [ian@pinguino ~]$ function mycalc () > { > local x > if [ $# -lt 1 ]; then > echo "This function evaluates arithmetic for you if you give it some" > elif (( $* )); then > let x="$*" > echo "$* = $x" > else > echo "$* = ...
syntax error near unexpected token then 同理,还有很多出错信息 比如 syntax error near unexpected token fi 等都是这样引起的. 5 if 后面一定要跟上 then. 同理 elif 后面一定要跟上 then. 不然提示出错信息: syntax error near unexpected token else top BASH IF http://lhsblog01.blog.163.com/blog/s...
The syntax of the if statement in Bash is: if first-test-commands; then consequent-commands; [elif more-test-commands; then more-consequents;] [else alternate-consequents;] fi Tests commands in the bash if statement, and bash elif clauses, are executed in order until one test succeed....
else echo "Values are NOT equal" fi 1. 2. 3. 4. 5. 6. 7. 8. 9. #!/bin/bash # declare integers NUM1=2 NUM2=1 if [ $NUM1 -eq $NUM2 ]; then echo "Both Values are equal" elif [ $NUM1 -gt $NUM2 ]; then echo "NUM1 is greater then NUM2" ...
A=10B=15if [ $A -eq $B ]then echo 'True'else echo 'False'fi 这是一个if条件判别语句(后面再细讲)。-eq判断运算符左右两边是否相等，如果是，则返回True，不然就返回False。关系判断运算符的基本格式是[ VAR1 OPERATOR VAR2 ]，用一个中括号括起来，这里有一点细节要注意，中括号和变量之间，...
我在linux上尝试了一下，得到下面的错误：输入变量 age 的值，再编写一个 if-elif-else 结构，根据 ...
在本教程中,您将学习:如何在 Bash 中比较字符串比较字符串的 if/else Bash 脚本示例 Bash 脚本:字符串比较示例例1 在 Bash 脚本中,您通常会将一个或两个字符串存储为变量...总结在本教程中,我们了解了如何在 Bash 脚本中比较字符串,尤其是在 Bash 脚本的上下文中if/else。...当然,此功能可以扩展到更健壮...
if [ ! -z err−o!−eapk ]; then 会报出-e无法找到的错误; 而if [ ! -z err]||[!−eapk ]; then 没问题; 整数比较 : -eq 等于,如:if [ "a"−eq"b" ] -ne 不等于,如:if [ "a"−ne"b" ] -gt 大于,如:if [ "a"−gt"b" ] ...
if 先来个实例： x=5; if [ $x = 5 ]; then echo 'x equals 5.'; else echo...