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1. Print Numbers 1–1002. Print Even Numbers in Range3. Print Odd Numbers in Range4. Sum of Digits5. Reverse Digits of a Number6. Calculate Factorial (Loop)7. Fibonacci Series8. Palindrome Number Check9. Count Digits in a Number10. GCD of Two Numbers (Loop)11. LCM of Two Numbers (Loop)12. Print Prime Numbers in Range13. Count Prime Numbers in Range14. Check Composite Number15. Power of 2 Checker16. Print Number Pattern17. Print Star Pattern18. Armstrong Numbers in Range19. Strong Numbers in Range20. Sum of Series 1/1 + 1/2 + … + 1/N21. Print Multiplication Series22. Print Pyramid Pattern23. Print Inverted Pyramid Pattern24. Print Floyd's Triangle25. Print Pascal's Triangle

Count Prime Numbers in Range in Python

Count how many prime numbers appear in a given inclusive range.

BeginnerLoop ProgramsExample 13 of 25
count-prime-numbers-in-range.py
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1# Program to count prime numbers in a range
2

3start = int(input("Enter start of range: "))
4end = int(input("Enter end of range: "))
5

6count = 0
7for num in range(start, end + 1):
8    if num < 2:
9        continue
10    is_prime = True
11    for i in range(2, int(num ** 0.5) + 1):
12        if num % i == 0:
13            is_prime = False
14            break
15    if is_prime:
16        count += 1
17

18print(f"Number of primes between {start} and {end} is {count}")

Output

Enter start of range: 1
Enter end of range: 10
Number of primes between 1 and 10 is 4

What's going on

We reuse the primality test logic but increment a counter instead of printing each prime.

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