Shell脚本中有关数据进制的问题（value too great for base (error token is "08")）

Posted 2023-02-02 javartisan

脚本内容：

#!/usr/bin/env bash

endWeek=`date +%V`
echo $endWeek
startWeek=$[`date +%V`-1]
year=`date +%Y`

if [[ $# -eq 2 ]]
then
 echo "please input startWeek and endWeek (week >=startWeek and week < endWeek) ！"
 startWeek=$1
 endWeek=$2
else
 echo "because of you don't input start and end date, use lastWeek and curWeek!"
fi


basePath=$(cd `dirname $0`;pwd)
pid=0
while [[ $startWeek -lt $endWeek ]]
do
    echo $year
    echo $startWeek
    #do something 忽略
    startWeek=$[$startWeek+1]
done
exit $pid

当前日期：2020-02-19

运行报错：

week_report_generator_with_bug.sh: line 7: 08: value too great for base (error token is "08")

出错的原因：Shell脚本中0开头的数字表示8进制，因此08则超出了8进制的范围。

知识点：Shell数据进制

 

Shell文档：https://bash.cyberciti.biz/shell/shell-math/