shellScript之for语句

本文主要是介绍shellScript之for语句，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

#!/bin/bash
for varibale1 in 1 2 3 4 5 6 
doecho "Hello,Welcome $varibale1 times"
done

#!/bin/bash
for variable1 in {1..5}
doecho "Hello,Welcome $variable1 times"
done

结果：

~/Note/test # ./6for2.sh 
Hello,Welcome 1 times
Hello,Welcome 2 times
Hello,Welcome 3 times
Hello,Welcome 4 times
Hello,Welcome 5 times

例子2：

求100内的奇数和

#!/bin/bash
for i in {1..100..2}
dolet "sum+=i"
done
echo "The sum is $sum"

结果：

~/Note/test # ./7for.sh 
The sum is 2500

例子3：

没有列表的for语句,这种情况一般就是命令行参数给列表

#!/bin/bash
echo "number of argument is $#"
echo "what you input is:"
for arguemnt
doecho "$arguemnt"
done

结果：

~/Note/test # ./8for_no_list.sh 
number of argument is 0
what you input is:
~/Note/test # ./8for_no_list.sh 1 2 3 
number of argument is 3
what you input is:
1
2
3

例子4：c语言格式的for语句

#!/bin/bash
for(( i = 1; i <= 5; i++ ))
doecho "$i"
done

#!/bin/bash
for(( i = 1;i <= 100; i += 2))
dolet "sum += i"
done
echo "sum = $sum"

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