Nested Loop Ruby Answer [closed] - ruby

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Need assistance saving and totaling the "rainfall input" after the loop has ended. Any advice would be appreciated.
puts "How many years"
years_input = gets.to_i
for years_input in (1..years_input)
puts "Years Passed: Years = " + years_input.to_s
for m in (1..12)
puts "Month: Month # = " + m.to_s
puts "Inches of rainfall"
rainfall_input = gets.to_i
end
end
puts "Total Months"
puts (years_input * 12).to_s
puts "Total Rainfall"

Answer 1

You need to have a place to store your "counter" in this case the total:
puts "How many years"
years_input = gets.to_i
total_rainfall = 0
for years_input in (1..years_input)
puts "Years Passed: Years = " + years_input.to_s
for m in (1..12)
puts "Month: Month # = " + m.to_s
puts "Inches of rainfall"
total_rainfall += gets.to_i
end
end
puts "Total Months"
puts (years_input * 12).to_s
puts "Total Rainfall"
puts total_rainfall

Answer 2

#Danilo has answered your question, so let me suggest how you might write your code in a more Ruby-like way. Let me first mention that for loops are never used by Ruby coders. Instead we use enumerators (like each and, here, times and sum) and blocks. That's in part to hide information within blocks to avoid it being seen by prying eyes outside the block.
require 'date'
puts "How many years?"
nbr_years = gets.to_i
puts "Number of years: #{nbr_years}"
nbr_years.times do
puts "Which year?"
y = gets.to_i
tot = (1..12).sum do |m|
puts "How many inches of rainfall in #{Date::MONTHNAMES[m]}, #{y}?"
gets.to_f
end
puts "Total rainfall in #{y} was #{tot} inches"
end
#{nbr_years} in "Number of years: #{nbr_years}" converts nbr_years to a string by computing nbr_years.to_s. (See Integer#to_s). It's called string interpolation. If nbr_years were an array, Array#to_s would be applied, and so on.
Search for "MONTHNAMES" in Date and you will find that Date::MONTHNAMES (among several date-related constants) has been defined for your convenience:
Date::MONTHNAMES
#=> [nil, "January", "February", "March", "April", "May", "June",
# "July", "August", "September", "October", "November", "December"]
In pure Ruby we need include 'date' to access that constant (no need for that with Rails).
nil is just a placekeeper. Date::MONTHNAMES[0] is never referenced by coders.
Note that for inches of rainfall per month you want gets.to_f rather than gets.to_i.
We can simulate this code by replacing the gets statements with generated values.
y = 2015
puts "How many years?"
nbr_years = 2
puts "Number of years: #{nbr_years}"
nbr_years.times do
puts
puts "Which year?"
y += 1
tot = (1..12).sum do |m|
puts "How many inches of rainfall in #{Date::MONTHNAMES[m]}, #{y}?"
f = (10 * rand).round(2)
puts "#{f} inches of rainfall in #{Date::MONTHNAMES[m]}, #{y}?"
f
end
puts "Total rainfall in #{y} was #{tot} inches"
end
The following (after minor editing) is displayed.
Which year?
How many inches of rainfall in January, 2016?
3.12 inches of rainfall in January, 2016?
How many inches of rainfall in February, 2016?
2.64 inches of rainfall in February, 2016?
...
How many inches of rainfall in December, 2016?
4.48 inches of rainfall in December, 2016?
Total rainfall in 2016 was 60.71 inches
Which year?
How many inches of rainfall in January, 2017?
7.15 inches of rainfall in January, 2017?
...
How many inches of rainfall in December, 2017?
7.87 inches of rainfall in December, 2017?
Total rainfall in 2017 was 36.31 inches