reply2. The function name can only be a combination of letters, numbers, and underscores, and cannot contain spaces. Numbers cannot be placed at the beginning of the variable name. For those who need to learn, this paragraph either does not understand or does not understand well, at least it is ambiguous...
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Learn c first
In php, all variables start with the $ symbol.
function function name (){
Function body; //The function body can be any executable code
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? Are you confused?
I understand, but there is a passage in the article that confused me and I feel a bit confused.
For example, the mathematical equation is x y=10, x is the variable, and the equation is the function.