Challenge 1 -- Write an Algorithm

computeSum(numbers)

Problem Statement:
Write an algorithm named "computeSum" to compute the sum of a collection of numbers. Return the result.

Given: Variable 'numbers' that holds a collection of numbers.

Sample 1:

Assume we have been provided elements [4, 2, 3, 1]
Then the result should be 10 (i.e., 4 + 2 + 3 + 1)

Sample 2:

Assume we have been provided elements [-10, -20, -30, -40, 100]
Then the result should be 0, i.e., (-10) + (-20) + (-30) + (-40) + 100

Writing Algorithm in Human Language

Write the algorithm in pseudocode.

Human Language:

computeSum(elements) {
	Let i be set to 0
	Let len equal to length of elements
	Let sum be set to zero
	While i is less than len
		Let nextElement equal to the element in elements at index i
		Let sum equal sum plus nextElem
		Let i bet set to i plus 1
Return sum
}

Writing Algorithm in Pseudocode

Write the algorithm in pseudocode.

Pseudocode:

function computeSum(elements) {
	let i = 0
	let len = elements.length
	let sum = 0
	while (i < len) {
		let nextElem = elements[i]
		sum += nextElem
		i += 1
	}
	return sum
}

_hiddenSource_

//Try It
let nums = [10, 20, 30, 40]
let sum = computeSum(nums);

println("Sum: " + sum);