Total Daily Energy Expenditure script

tdee.rb

#!/usr/bin/env ruby

# Function to calculate BMR
def calculate_bmr(gender, weight, height, age)
  if gender.downcase == 'male'
    return 88.362 + (13.397 * weight) + (4.799 * height) - (5.677 * age)
  else
    return 447.593 + (9.247 * weight) + (3.098 * height) - (4.330 * age)
  end
end

# User input
puts "Enter your gender (male/female):"
gender = gets.chomp
puts "Enter your age (years):"
age = gets.to_i
puts "Enter your weight (kg):"
weight = gets.to_f
puts "Enter your height (cm):"
height = gets.to_f
puts "Enter your activity level (1.2 for sedentary, 1.375 for lightly active, 1.55 for moderately active, 1.725 for very active, 1.9 for extra active):"
activity_level = gets.to_f

# Calculate BMR
bmr = calculate_bmr(gender, weight, height, age)

# Calculate TDEE
tdee = bmr * activity_level


puts "Your Total Daily Energy Expenditure (TDEE) is: #{tdee.round(2)} calories/day."