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1. Count Digits in a Number2. Reverse a Number3. Check Palindrome Number4. Sum of Digits5. Armstrong Number Check6. Perfect Number Check7. Print Primes Between 1-1008. Check if Number is Prime9. Fibonacci Series Up to N10. Sum of First N Fibonacci Terms11. Product of Digits12. Strong Number Check13. Harshad Number Check14. Abundant Number Check

Print Primes Between 1-100

Print all prime numbers between 1 and 100.

IntermediatePhase 2 - Level 2: Number-based Looping LogicExample 7 of 14
print-primes-between-1-100.py
1# Print primes from 1 to 100
2print("Prime numbers from 1 to 100:")
3for num in range(2, 101):
4    is_prime = True
5    for i in range(2, int(num ** 0.5) + 1):
6        if num % i == 0:
7            is_prime = False
8            break
9    if is_prime:
10        print(num, end=" ")
11print()

Output

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

What's going on

Check each number for primality.

Key Concepts:

Outer loop: numbers 2 to 100
Inner loop: check divisors up to sqrt(num)
If no divisor found, it's prime

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