'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...
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...
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，...
if 先来个实例： x=5; if [ $x = 5 ]; then echo 'x equals 5.'; else echo...
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 $NUM2 ]; then echo "NUM1 is greater then NUM2" ...
The syntax of the if statement in Bash is: if first-test-commands; then consequent-commands; [elif more-test-commands; then more-consequents;] [else alternate-consequents;] fi Tests commands in the bash if statement, and bash elif clauses, are executed in order until one test succeed....
syntax error near unexpected token `if' 发布于 2 月前 ✅ 最佳回答: 建议尝试以下方法#!/bin/basholdFiles.txt janeSearch=$(grep“jane”。/data/list.txt | cut-d'-f 1,3)搜索中的x;如果(测试-e~/$x);然后echo$x>>oldFiles.txtfi完成...
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" ] ...
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 ...