Calculating the Product of Two Arrays

Question

Calculating the Product of Two Arrays

I'm attempting to multiply two arrays that are the same length and generate a third array from it.

After experimenting with loops, I believe using a nested loop is the most effective approach.

Here is my initial implementation, which unfortunately multiplied out the entire array:

var one = [1, 2, 3, 4, 5];
var two = [1, 2, 3, 4, 5];

//var partOne = one.length

var partOne = []
  for(var i=0; i<one.length;i++) {
    for(var j=0;j<two.length;j++) {
      partOne.push({value:one[i] * two[i]});
    }
  }

I am aiming for something akin to this example below:

var a = [3, 5]
var b = [5, 5]

//answer

var c = [15, 25]

javascript arrays

Answer 1

Answer №1

function multiplyNumbers(arr1, arr2) {
    var result = [];
    for (var i=0; i<arr1.length;i++) {
        result.push(arr1[i]*arr2[i]);
    }
    return result;
}
var array1 = [3, 5 ];
var array2 = [5, 5 ];
var multipliedArray = multiplyNumbers(array1, array2);
console.log(multipliedArray);

var array1 = [3, 5 ]
var array2 = [5, 5 ]
var multipliedArray = []

for (var i=0; i<array1.length;i++) {
    multipliedArray.push(array1[i]*array2[i]);
}

console.log(multipliedArray);

Answer 2

function multiplyNumbers(arr1, arr2) {
    var result = [];
    for (var i=0; i<arr1.length;i++) {
        result.push(arr1[i]*arr2[i]);
    }
    return result;
}
var array1 = [3, 5 ];
var array2 = [5, 5 ];
var multipliedArray = multiplyNumbers(array1, array2);
console.log(multipliedArray);

var array1 = [3, 5 ]
var array2 = [5, 5 ]
var multipliedArray = []

for (var i=0; i<array1.length;i++) {
    multipliedArray.push(array1[i]*array2[i]);
}

console.log(multipliedArray);

Answer 3

Answer №2

const numbers = [3, 5];
const multipliers = [5, 5];

// Multiply each element in 'numbers' array by the corresponding element in 'multipliers' array
const result = numbers.map((num, index) => { return num * multipliers[index]; });

Output:

// Returns: [ 15, 25 ]

Answer 4

const numbers = [3, 5];
const multipliers = [5, 5];

// Multiply each element in 'numbers' array by the corresponding element in 'multipliers' array
const result = numbers.map((num, index) => { return num * multipliers[index]; });

Output:

// Returns: [ 15, 25 ]

Calculating the Product of Two Arrays

Answer №1

Answer №2

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