problem-solving-with-algorithms-and-data-structure-usingpython(使用python解决算法和数据结构) -- 算法分析

1. 计算前n个整数的和

def sumOfN(n):
    theSum = 0
    for i in range(1,n+1):
        theSum += i
    return theSum
print(sumOfN(10))

解法一