Mastering JavaScript

Chapter 7
The body of the function can be enclosed by { .. } if there's more than one
expression in the body. If there's only one expression, and you omit the surrounding
{ .. }, there's an implied return in front of the expression. There are several
variations of how you can write arrow functions. The following are the most
commonly used:
// single argument, single statement
//arg => expression;
var f1 = x => console.log("Just X");
f1(); //Just X
// multiple arguments, single statement
//(arg1 [, arg2]) => expression;
var f2 = (x,y) => x*y;
console.log(f2(2,2)); //4
// single argument, multiple statements
// arg => {
// statements;
// }
var f3 = x => {
if(x>5){
console.log(x);
}
else {
console.log(x+5);
}
}
f3(6); //6
// multiple arguments, multiple statements
// ([arg] [, arg]) => {
// statements
// }
var f4 = (x,y) => {
if(x!=0 && y!=0){
return x*y;
}
}
console.log(f4(2,2));//4
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