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1. Check if Element Exists2. Count Occurrences3. Find First Occurrence4. Find Last Occurrence5. Check Uniqueness6. Sum of Even Elements7. Sum of Odd Elements8. Count Prime Numbers9. Count Divisible by 3 & 510. Count Perfect Squares

Count Divisible by 3 & 5

Count elements divisible by both 3 and 5.

IntermediatePhase 4 - Level 2: Searching & Counting LogicExample 9 of 10
count-divisible-by-3-5.py
1# Take array
2n = int(input("Enter array size: "))
3arr = []
4for i in range(n):
5    arr.append(int(input(f"Element {i+1}: ")))
6

7# Count
8count = 0
9for element in arr:
10    if element % 3 == 0 and element % 5 == 0:
11        count += 1
12

13print(f"Count: {count}")

Output

Enter array size: 5
Element 1: 15
Element 2: 30
Element 3: 10
Element 4: 20
Element 5: 45
Count: 3

What's going on

Check both conditions with AND.

Key Concepts:

Divisible by 3: element % 3 == 0
Divisible by 5: element % 5 == 0
Both must be true

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