#help Write a program in python to check whether a number can be expanded as the sum of two prime numbers.

Question

For example, the number can be expanded as two prime numbers 2 and 7, 9=2+7

Answer 1

Misal, I am not sure what is your question? What have you tried so far? Can you share us some code?

Answer 2

hi Misla, Hmmmm, i am not sure what your code is doing. It creates a long list of numbers - i have no glue what this means. I would suggest you start from scratch. Create a list of primes from 2 up to the input value. Then iterate through this list and find the 2 prime values that give in sum the input input number.

Here something you can start with:

def getprime(n):
primelist = []
for i in range(2, n + 1):
if i > 1:
for n in range(2, i):
if (i % n) == 0:
break
else:
print(i)
primelist.append(i)
print('\n', primelist)

The rest of the code is your part.

Answer 3

Misal, I am not sure what is your question? What have you tried so far? Can you share us some code?

Hii..Lother here is my code..

def nextPrime(n):
while not isPrime(n - 1):
n = n + 1
return n

def isPrime(n):
for i in range(2, n):
print(n)
if n % i == 0:
return 0
return 1

x = int(input('Enter any number : '))

for i in range(2, x - 1):
i = nextPrime(i)
if isPrime(x - 1):
print(i, ' + ', x - 1, ' = ', x)