python中for循环如何对等差数列求和_python中for循环计算等差数列总和的实例

# 定义参数
a = 1   # 首项
d = 2   # 公差
n = 5   # 项数
<h1>初始化总和</h1><p>total = 0</p>
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                <h1>使用for循环遍历每一项并累加</h1><p>for i in range(n):
term = a + i * d  # 第i项（从0开始）
total += term</p><p>print("等差数列总和为：", total)

等差数列总和为： 25

a = 1
d = 2
n = 5
<h1>计算末项（注意range不包含终点，所以要+1）</h1><p>last_term = a + (n - 1) * d</p><h1>使用range生成数列并求和</h1><p>total = 0
for term in range(a, last_term + 1, d):
total += term</p><p>print("总和为：", total)