Week 3 Lecture

cs171/Lect03/ch5.py

+
+
+def func1(i):
+    return i + 2
+
+def func2(i):
+    x = func1(i-1)
+    return x + 5
+
+def func3(i):
+    if i <= 0:
+        return 0
+    else:
+        print(i)
+        func3(i // 2)
+
+i = 14
+a = func2(i)
+func3(i)
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cs171/Lect03/hello.py

-print("Hello CS 171")
+# age = int(input("Enter your age: "))
+# if age >= 21 :
+#     print("Line 3 executed.")
+#     print("Line 4 also is conditional")
+#     print("This is because of indentation")
+
+
+def weightToKg(pounds):
+    POUNDS_PER_KG = 0.453592
+    return pounds * POUNDS_PER_KG
+
+def heightToMeters(feet, inches):
+    INCHES_PER_FOOT = 12
+    INCHES_PER_METER = 0.0254
+    totalInches = inches + feet * INCHES_PER_FOOT
+    return totalInches * INCHES_PER_METER
+
+def calculateBMI(pounds, feet, inches):
+    kg = weightToKg(pounds)
+    meters = heightToMeters(feet, inches)
+    bmi = kg / (meters ** 2)
+    return bmi
+
+def weightStatus(bmi):
+    if bmi < 18.5:
+        return "Underweight"
+    elif bmi <= 24.9:
+        return "Normal Weight"
+    elif bmi <= 29.9:
+        return "Over Weight"
+    else:
+        return "Obese"
+        
+
+print("Welcome to BMI Calculator")
+
+validData = True
+weight = float(input("Enter your weight in pounds: "))
+if weight > 0 :
+    heightFeet = int(input("Enter your height (feet): "))
+    heightInches = int(input("Enter your height (inches): "))
+
+    if heightFeet < 0 or heightInches < 0:
+        print("Height entry invalid")
+        validData = False
+
+else:
+    validData = False
+    print("Weight is too low.")
+    print("Calculation cannot be performed.")
+    
+if validData == True:
+    print("Entries were OK. We are clear to calculate.")
+    kg = weightToKg(weight)
+    print("Your weight in kg is", kg)
+    meters = heightToMeters(heightFeet, heightInches)
+    print("Your height in meters is", meters)
+    bmi = calculateBMI(weight, heightFeet, heightInches)
+    print("Your BMI is", bmi)
+    status = weightStatus(bmi)
+    print("In this case, the chart says you are", status)
+else:
+    print("Entry errors. We cannot proceed")
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