Python: Compute the sum of first n given prime numbers
Python Basic - 1: Exercise-52 with Solution
Write a Python program to compute the sum of first n given prime numbers.
n ( n ≤ 10000). Input 0 to exit the program.
MAX = 105000 print("Input a number (n≤10000) to compute the sum:(0 to exit)") is_prime = [True for _ in range(MAX)] is_prime = is_prime = False for i in range(2, int(MAX ** (1 / 2)) + 1): if is_prime[i]: for j in range(i ** 2, MAX, i): is_prime[j] = False primes = [i for i in range(MAX) if is_prime[i]] while True: n = int(input()) if not n: break print("Sum of first",n,"prime numbers:") print(sum(primes[:n]))
Input a number (n≤10000) to compute the sum:(0 to exit) 25 Sum of first 25 prime numbers: 1060
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Previous: Write a Python program to find the difference between the largest integer and the smallest integer which are created by 8 numbers from 0 to 9. The number that can be rearranged shall start with 0 as in 00135668.
Next: Write a Python program that accept a even number (>=4, Goldbach number) from the user and create a combinations that express the given number as a sum of two prime numbers. Print the number of combinations.
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