- #! /bin/bash
- for i in `seq 0 23`; do
- if [ $i -lt 10 ] ; then
- itask=`echo $i |sed 's/[0-9]/0&/'`
- echo $itask
- else itask=`echo $i`
- echo $itask
- fi
- done
0
#!/bin/bash
#在0到9的数字前加一个零，大于9的不加
read -p "plz input a number: " num
if [ $num -ge "0" ] && [ $num -le "9" ];then
echo 0$num
else
echo $num
fi
#在0到9的数字前加一个零，大于9的不加
read -p "plz input a number: " num
if [ $num -ge "0" ] && [ $num -le "9" ];then
echo 0$num
else
echo $num
fi
0
#! /bin/bash
for i in `seq 0 23`; do
if [ $i -lt 10 ] ; then
itask=`echo $i |sed 's#[0-9]#0&#'`
echo $itask
else
echo $i
fi
done
for i in `seq 0 23`; do
if [ $i -lt 10 ] ; then
itask=`echo $i |sed 's#[0-9]#0&#'`
echo $itask
else
echo $i
fi
done
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