Python|元素的重复添加

Question

例如，水的分子量(H20)为: 2(1.00794) + 15.9994 = 18代码：

formula = int(input("Enter the number of elements: "))
for i in range(formula):
    element = input("enter your element: ")
    molCount = float(input("enter the molecule count: "))
    print(molCount)
    atomWeight = float(input("enter the atomic weight: "))
    print(atomWeight)
    total = molCount*atomWeight
print(total)
total = total + total
print(total)

需要有关将多个元素添加到一起的帮助...

Answer 1

线路上有一个错误：total = molCount*atomWeight

您可能指的是total += molCount*atomWeight。

Answer 2

首先，在for循环之前定义total。其次，我认为你的方程式需要

total += (molCount * atomWeight)

而不是原来的。编辑代码：

formula = int(input("Enter the number of elements: "))
total = 0
for i in range(formula):
    molCount = int(input("Enter the molecule count: "))
    print("Molecule count: " + str(molCount))
    atomWeight = float(input("Enter the atomic weight: "))
    print("Atomic Weight: " + str(atomWeight))
    total += (molCount * atomWeight)
print(total)