The shell creates the user in bulk and points out the error?

The script comes from----a work unit     #脚本是错误的, and I've corrected it when I work.          work in the time I found a inexplicable script   I think the script writes a lot of errors  ~                                  let's see where the error is and point out that you are upgrading your technology.   #!/bin/bsah#Batch add userread -t 30 -p  "Please input name :  " nameread -t 30 -p " please input num:  "  numread  -t 30 -p  "please input passwoed: "  passif [ ! -z  $name  -a ! -z  $num  -a ! -z  $pass  ]         then                 y=$ (echo  $num  | sed  ' s/^[0-9]*$ '//g)          if [ -z  "$y"  ]                 then                         for  ( i=1;i<= $num; i=i+1  )                 do                          useradd  $name $i &>/dev/null                          echo  $pass  | password --stdin  "$name $i"  &>/dev/null                 done         fifi 

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The shell creates the user in bulk and points out the error?