Programming Fundamentals/Functions/Ruby

functions.rb

# This program asks the user for a Fahrenheit temperature, 
# converts the given temperature to Celsius,
# and displays the results.
#
# References:
#     https://www.mathsisfun.com/temperature-conversion.html
#     https://en.wikibooks.org/wiki/Ruby_Programming

def get_fahrenheit()
    puts "Enter Fahrenheit temperature:"
    fahrenheit = gets.chomp.to_f
        
    return fahrenheit
end

def calculate_celsius(fahrenheit)
    celsius = (fahrenheit - 32) * 5 / 9
        
    return celsius
end

def display_result(fahrenheit, celsius)
    puts (fahrenheit).to_s + "° Fahrenheit is " + (celsius).to_s + "° Celsius"
end

def main()
    fahrenheit = get_fahrenheit()
    celsius = calculate_celsius(fahrenheit)
    display_result(fahrenheit, celsius)
end

main()

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Copy and paste the code above into one of the following free online development environments or use your own Ruby compiler / interpreter / IDE.

Programming Fundamentals/Functions/Ruby

functions.rb

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