asda

const array1 = [1,2,3,4,5,6,7,8,9];
let result = array1.map(el => el*2)

const array1 = [1,2,3,4,5,6,7,8,9];
let result = array1.reduce((accumulator, currentValue) => {
	 accumulator.push(currentValue*2);
	 return accumulator
	}, [])

const array1 = [1,2,3,4,5,6,7,8,9];
let result = [];
for (i=0; i<array1.length; i++) {
	result.push(array1[i]*2);
}

let result = [1,2,3,4,5,6,7,8,9];
for (i=0; i<result.length; i++) {
	result[i] = result[i]*2;
}