循环输出,两个小程序

#!/bin/bash a=1 while [ $a -le 5 ] do b=1     while [ $b -le $a ]     do         echo -n $b         let b++     done     let a++     echo  done

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results:

1

12

123

1234

12345
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#!/bin/basha=1c=1while [ $a -le 9 ]dob=$[ $a-$c+1 ]    while [ $b -le $a ]    do        echo -n $b        let b++    done    let a=a+2    let c++    echodone

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#!/bin/bashfor i in `seq 5`do   let j=$i;   for k in `seq $i`       do           echo -n $j;           let j++;       done  echo -e "\n"done

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results:

1

23

345

4567

56789

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