Note that From the list of prime numbers between 1 and 100 obtained. Now what is happening is, for every instance of a prime number x (the prime number) is being added (appended) to the list primeNums. Finally, only the numbers which are not multiples of any number remain in the list. Again, using the if statement from before: #defining the list To create a list of prime numbers, you must first define a list, and then add the prime numbers to that list.

What this does now, is for every instance of a prime number, you will add 1 to the count of prime numbers.

Prime Numbers Facts: The only even prime number is 2 and the remaining even numbers can be divided by 2. Thus what is happening, when you use 100 as your num your function will return 1060, as this is the sum of all the primes up to 100.įirst, if you want to know the total amount of prime numbers up to a certain number, you can use the following: #define a variable to track the total number of primes A Prime Number is: (if we can make it by multiplying other whole numbers it is a Composite Number) Here we see it in action: 2 is Prime, 3 is Prime, 4 is Composite (2×2), 5 is Prime, and so on. The list of prime numbers 1 to 100 are given below: Prime Numbers from 1 to 100 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. The problem lies within this: if sympy.isprime(x) = True:Ībove, when you are doing primes = primes + x what you are saying is that you want to add the value of the x (a prime number) to the variable primes. Numbers 2, 3, 5, 7, 11, and 13 are all prime numbers, but 4, 6, 8, 9, and 10 are not, because they can be divided evenly by numbers other than 1 and themselves.

Prime numbers list to 100