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1. Sum of List Elements2. Largest Element in List3. Smallest Element in List4. Count Occurrences in List5. Remove Duplicates from List6. Merge Two Lists7. Intersection of Lists8. Union of Lists9. Sort List10. Reverse List11. Check if List is Sorted12. Find Second Largest Element13. Find N Largest Elements14. Clone / Copy List15. Rotate List16. Remove Empty Lists17. Flatten Nested List18. Find Common Elements of Two Lists19. List Slicing Programs20. Replace List Elements21. Remove Element by Value22. Count Prime Numbers in List23. Pair Sum Problem24. Unique Elements from Both Lists25. List Difference

Count Prime Numbers in List in Python

Count how many prime numbers are present in a list of integers.

IntermediateList ProgramsExample 22 of 25
count-prime-numbers-in-list.py
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1# Program to count prime numbers in a list
2

3def is_prime(n: int) -> bool:
4    if n < 2:
5        return False
6    for i in range(2, int(n ** 0.5) + 1):
7        if n % i == 0:
8            return False
9    return True
10

11numbers = list(map(int, input("Enter integers separated by space: ").split()))
12

13count = sum(1 for x in numbers if is_prime(x))
14

15print("Number of primes in list:", count)

Output

Enter integers separated by space: 2 3 4 5 6
Number of primes in list: 3

What's going on

We define a helper is_prime and count how many list elements satisfy it.

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