Calculate 1+12+123+1234+12345+...+1234567
- WBOYOriginal
- 2016-08-10 08:49:223461browse
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<?
/*
作者: shyhero
邮箱: shyhero@outlook.com
Q Q: 1757424878
*/
// 计算1+12+123+1234+12345+...+1234567
for($i=1;$i<=7;$i++){
$str .= $i;
}
$str = (int)$str;
var_dump($str);
$sum = 0;
for($i=$str;$i>=1;$i=(int)($i/10)){
$sum += $i;
}
echo $sum;
?>
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