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You can use a for loop to implement cumulative summation in Python
for loop syntax:
for 变量 in range(x): 循环需要执行的代码
The following implements the summation from 1 to n:
def main(): sum = 0 # 定义变量做累加器 n = int(input('n=')) #从键盘上输入累加的范围 for x in range(n): sum += (x + 1) print(sum) if __name__ == '__main__': main()
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