JavaScript: Sum of all odds in a matrix

JavaScript Math: Exercise-91 with Solution

Sum of Odd Elements in Matrix

Write a JavaScript program to calculate the sum of all odd elements in a square matrix.

Test Data:
([ [1, 2, 3], [4, 5, 6], [7, 8, 9] ]) -> 25
( [ [-1, -2], [-4, -5] ]) -> -6

Sample Solution:

JavaScript Code:

/**
 * Function to calculate the sum of all odd numbers in a matrix.
 * @param {number[][]} nums - The matrix containing numbers.
 * @returns {number} - The sum of all odd numbers in the matrix.
 */
function test(nums) {
    // Flatten the matrix into a single array
    return nums.reduce((b,a) => [...b,...a], [])
        // Calculate the sum of all odd numbers in the flattened array
        .reduce((b,a) => !(a%2) ? b: a+b , 0);
}

// Test cases
// Test the sum of all odd numbers in the first matrix
nums = [
        [1, 2, 3],
        [4, 5, 6],
        [7, 8, 9]
       ];
console.log("Sum of all odds of the said matrix: "+test(nums));

// Test the sum of all odd numbers in the second matrix
nums = [
        [-1, -2],
        [-4, -5]
       ];
console.log("Sum of all odds of the said matrix: "+test(nums));

Output:

Sum of all odds of the said matrix: 25
Sum of all odds of the said matrix: -6

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-91 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that iterates through a square matrix and sums all the odd numbers found.
• Write a JavaScript function that uses nested loops to accumulate the sum of odd elements in a two-dimensional array.
• Write a JavaScript function that applies the filter method to each row to extract odd numbers before summing them.
• Write a JavaScript function that handles matrices with both positive and negative odd numbers while calculating the sum.

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