JavaScript Operators

Photo by Pankaj Patel on Unsplash

JavaScript have different types of operators, first let’s talk about Logical Operators. JavaScript supports three logical operators: and,or and not. This operators area applied to Boolean values for example

console.log(true && false); // -> && and operator
//output -> false
console.log(true && true);
//output -> true

Like we can see, to get a true output both values have to be true, if one of them is false, the output will be false. For other to get a true output with the or operator, we just need one true value.

console.log(false || true); // -> || or operator
//output -> true
console.log(false || false);
//output -> false

The last operator is not, this operator flips the value of given to it

console.log(!true) // -> ! not operator
//output -> false

Unary Operators

A unary operator is one that takes a single operand/argument and performs an operation.

This is a list of unary operators

https://www.digitalocean.com/community/tutorials/javascript-unary-operators-simple-and-useful

Ternary operator

An special operator who is used like a short if statement, let’s see:

//If statement
if(true){ 
   console.log("hola");
}else{
   console.log("mundo");
}
//output -> hola
//Ternary operator
true ? console.log("hola") : console.log("mundo")
//output -> hole 

We also have the spread operator, this one is used to destructuring objects and arrays, for example

const arrayOne = [1,2,3];
const arrayTwo = [4,5,6];
const fullArray = [...arrayOne,...arrayTwo];
console.log(fullArray);
//output -> [1,2,3,4,5,6]

Get more info https://eloquentjavascript.net/01_values.html