编写 BMI 计算器的 Python 程序

体重指数计算器：

BMI 是一种快速且廉价的方法，可将一个人的体重分为体重不足、正常、超重或肥胖。

BMI 公式：

BMI 的计算方法是体重除以身高的平方：

公制单位：
BMI = 体重 (kg) / [身高 (m)]2

美国习惯单位：
BMI = 体重（磅）/[身高（英寸）]2 x 703

示例：

# Input the weight in kilograms
weight = float(input("Enter your weight (in kg): "))

# Input the height in meters
height = float(input("Enter your height (in meters): "))

# Calculate BMI using the formula: 
bmi = weight / (height ** 2)

# Output the calculated BMI value
print("BMI:", round(bmi, 2))  # Rounds BMI to 2 decimal places 

# Function to provide feedback based on BMI 
def bmi_feedback(bmi):
    if bmi < 18.5:
        return "You are underweight"
    elif 18.5 <= bmi <= 24.9:
        return "You have a healthy weight"
    elif 25 <= bmi <= 29.9:
        return "You are overweight"
    else:
        return "You are obese"

# Call the feedback function and store the result
bmi_result = bmi_feedback(bmi)

# Output the BMI category feedback
print("BMI Result:", bmi_result)

输出：

Enter your weight:58
Enter your height:1.67
BMI: 20.796729893506402
BMI Result: You have a healthy weight

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