The mathematical formula to find the sum of 1²+2²+3²+….+n² is n(n+1)(2n+1)/6
So to find the sum of series we use this formula.
Program:
n = int(input("Enter Positive Number : "))
sum = 0
sum= (n*(n+1)*(2*n + 1))/6
print("The Sum of Series is",sum)
Output:
Enter Positive Number : 5
The Sum of Series is 55.0
Program: for x in range(1,20): if(x%2==0 or x%3==0): continue print(x,end='') print("\n") Output: 1 5 7 11 13 17 19
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