======[已解决]求随机数大于等于5位数才退出循环，怎么做呢？======

elu_ligao

1. while true
   
2. do
   
3.     pd=`echo $RANDOM`
   
4.     pd_length=`echo ${#pd}`
   
5.     [ $pd_length -ge 5 ] && break
   
6. done

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我是一隻羊

1. #!/bin/bash
   
2. 
   
3. while :;do
   
4.     a=$RANDOM
   
5.     [ "$a" -ge 10000 ]\
   
6.         && {
   
7.             echo $a" break"
   
8.             break
   
9.         }\
   
10.         || echo $a
    
11. done

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jason680

回复 1# 奋斗的毛毛虫

$ while [ $RANDOM -lt 10000 ]; do echo -n .; done
.
$ while [ $RANDOM -lt 10000 ]; do echo -n .; done
...
$ while [ $RANDOM -lt 10000 ]; do echo -n .; done

$ while [ $RANDOM -lt 10000 ]; do echo -n .; done
....
$ while [ $RANDOM -lt 10000 ]; do echo -n .; done

   

jcdiy0601

#!/bin/bash

num=0

while [ $num -ne 1 ]
do
  pd=`echo $RANDOM`
  pd_length=`echo ${#pd}`
  if [ $pd_length -ge 5 ]
  then
    break
  else
    echo $pd
  fi
done