some progress

test/ruby/24.out

@@ -0,0 +1,20 @@
+def calculate_bmi(weight, height)
+  bmi = weight / height ** 2
+  if bmi < 18.5
+    category = "Underweight"
+  else
+    if bmi < 25
+      category = "Normal"
+    else
+      if bmi < 30
+        category = "Overweight"
+      else
+        category = "Obese"
+      end
+    end
+  end
+  return "BMI: #{bmi}, Category: #{category}"
+end
+print(calculate_bmi(70, 1.75), "\n")
+print(calculate_bmi(90, 1.80), "\n")
+print(calculate_bmi(50, 1.65), "\n")