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$sum=1;for($i=1;$i<=$name;$i ){$sum*=$name[$i];echo "{$sname} != {$sum}";
提示错误？
! =If you put it in double quotes, wouldn't it just be a string?
The cause of the error has been solved and now I understand! = has no specific meaning, just a symbol
The reason for the error is that the braces after the for loop do not match
That's right
That's not a factorial, it's a statement from echo, so it looks like a factorial after it's output.
var_dump()Try
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
! =If you put it in double quotes, wouldn't it just be a string?
The cause of the error has been solved and now I understand! = has no specific meaning, just a symbol
The reason for the error is that the braces after the for loop do not match
That's right
That's not a factorial, it's a statement from echo, so it looks like a factorial after it's output.
var_dump()Try