function expressions

• function declaration:
  • define a reusable block of code that performs a specific task

const numbers = [1, 2, 3, 4, 5, 6];
const squares = numbers.map(square);
 
console.log(squares);
 
function square(element){
	return Math.pow(element, 2);
}

• function expressions:
  • a way to define functions as values or variables

const numbers = [1, 2, 3, 4, 5, 6];
const squares = numbers.map(function(element){
	return Math.pow(element, 2);
});
 
console.log(squares);
 
 
const evenNums = numbers.filter(function(element{
	return element % 2 === 0;
});
 
const oddNums = numbers.filter(function(element{
	return element % 2 !== 0;
});