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if elif else ... and while
this example from a Well House Consultants training course
Source code: five Module: R050
print "How tall are you? " height = gets.to_f # Read a number and convert from string to float print "How heavy are you? " weight = gets.to_f bmi = weight / height / height while bmi > 25 print "You are #{height}m tall and weigh #{weight} kgs\n" print "Your bmi is #{bmi} based on that data\n" # Note - setting a value within the conditions to come # up with a commonallity for shared code later on! if bmi < 20 puts "You need to eat like a horse" whatyou = "skinny" elsif bmi > 40 puts "Go see a doctor" whatyou = "obese" elsif bmi > 30 puts "cut your food intake" whatyou = "plump" else puts "You's about right" whatyou = "healthy" end puts "We would describe you as ... #{whatyou} !" bmi = weight / height / height weight = weight - 2 end __END__ Sample output: wizard:rs10 graham$ ruby five How tall are you? 1.9 How heavy are you? 120 You are 1.9m tall and weigh 120.0 kgs Your bmi is 33.2409972299169 based on that data cut your food intake We would describe you as ... plump ! You are 1.9m tall and weigh 118.0 kgs Your bmi is 33.2409972299169 based on that data cut your food intake We would describe you as ... plump ! You are 1.9m tall and weigh 116.0 kgs Your bmi is 32.6869806094183 based on that data cut your food intake We would describe you as ... plump ! You are 1.9m tall and weigh 114.0 kgs Your bmi is 32.1329639889197 based on that data cut your food intake We would describe you as ... plump ! You are 1.9m tall and weigh 112.0 kgs Your bmi is 31.5789473684211 based on that data cut your food intake We would describe you as ... plump ! You are 1.9m tall and weigh 110.0 kgs Your bmi is 31.0249307479224 based on that data cut your food intake We would describe you as ... plump ! You are 1.9m tall and weigh 108.0 kgs Your bmi is 30.4709141274238 based on that data cut your food intake We would describe you as ... plump ! You are 1.9m tall and weigh 106.0 kgs Your bmi is 29.9168975069252 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 104.0 kgs Your bmi is 29.3628808864266 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 102.0 kgs Your bmi is 28.808864265928 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 100.0 kgs Your bmi is 28.2548476454294 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 98.0 kgs Your bmi is 27.7008310249307 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 96.0 kgs Your bmi is 27.1468144044321 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 94.0 kgs Your bmi is 26.5927977839335 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 92.0 kgs Your bmi is 26.0387811634349 based on that data You's about right We would describe you as ... healthy ! You are 1.9m tall and weigh 90.0 kgs Your bmi is 25.4847645429363 based on that data You's about right We would describe you as ... healthy ! wizard:rs10 graham$ Learn about this subject
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