Program to Find Prime Numbers
Prime numbers are numbers that are only divisible by 1 and themselves. To find all prime numbers up to a given number, we can use a simple program that checks each number from 2 up to the given number to see if it is prime.

Steps to Find Prime Numbers:
1. Input: Take the input of the desired number up to which you want to find prime numbers.
2. Create a Function: Define a function to check if a number is prime or not. This function will return True if the number is prime and False otherwise.
3. Loop: Use a loop to iterate through all numbers from 2 to the given number.
4. Check Prime: For each number in the loop, call the function created in step 2 to check if it is prime.
5. Display: If the number is prime, print it as output.

Python Code:
python
def is_prime(num):
if num < />
return False
for i in range(2, int(num ** 0.5) + 1):
if num % i == 0:
return False
return True
n = int(input("Enter a number: "))
print("Prime numbers up to", n, "are:")
for i in range(2, n+1):
if is_prime(i):
print(i)

Explanation:
- The function `is_prime` checks if a number is prime by dividing it by numbers from 2 up to its square root.
- The main loop iterates through numbers from 2 to the given number and prints the prime numbers.
This program efficiently finds all prime numbers up to the given number using the concept of prime numbers and a simple function to check for primality.