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Consecutive Sums

Explore how to use nested loops and array methods in Ruby to find all possible consecutive natural number sums for a given number. This lesson helps you practice looping concepts and output formatting for problem solving.

We'll cover the following...

Problem

Some natural numbers can be written as a sum of consecutive natural numbers. For example:

Some can be written in more than one way. For example:

Write a program to output all possible ways to do this for a given natural number.

Enter a number: 9 
9 = 2 + 3 + 4 
9 = 4 + 5
Finding consecutive numbers that sum to a target number

Purpose

  • Loop within another loop with different looping variables

  • Loop over a number range with a variable

  • Print the array element using a custom join character

Analyze

An addition operation involves at least two numbers. In other words, the maximum number in a sequence of consecutive natural numbers in the question can only be  ...