JS rest parameter return brace position

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rest parameter

ES6 is newly added to compensate for this situation:

    function sum(a,b){
    
    
        console.log(a+b);
        if(arguments.length>2)
            for(var i=2;i<arguments.length;i++>)
            console.log(arguments[i]);
    }

I want to output additional incoming parameters. When using arguments, I must exclude the previously specified items

ES6 rest parameters can be changed like this:

    function sum(a,b,...rest){
    
    
        console.log(a+b);
        console.log(rest);
    }

The value of rest is an array composed of redundant items. The
output is: Array[the latter item]

rest can change the name at will

The true usage of return brackets

    return 
        1;

js automatic semicolon is equivalent to

    return;
    1;

Add parentheses to meet the branch situation

    return (
        1
    ); 

Pay attention to the semicolon