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#!/bin/bash
while
: ;
do
read
-p
" u input:"
n
n1=`
echo
"$n"
|
sed
's/[a-z]//g'
`
if
[ -z $n1 ]
then
echo
"$n is not number,please try agint"
continue
elif
[ $? -
eq
1 ]
then
echo
"$n is number"
exit
0
fi
done
|
本文转自wsw26 51CTO博客，原文链接：http://blog.51cto.com/wsw26/1753766如需转载请自行联系原作者
