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1. Compare Arrays (Same Order)2. Compare Arrays (Ignore Order)3. Merge Two Arrays4. Find Common Elements5. Elements in A Not in B6. Count Common Elements7. Element-wise Sum8. Element-wise Product9. Frequency Array10. Elements Appearing More Than Once

Frequency Array

Create frequency array showing count of each element.

IntermediatePhase 4 - Level 4: Aggregation & ComparisonExample 9 of 10
frequency-array.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# Create frequency dictionary
8freq = {}
9for element in arr:
10    freq[element] = freq.get(element, 0) + 1
11

12# Display frequency
13print("Frequency:")
14for element, count in sorted(freq.items()):
15    print(f"{element}: {count}")

Output

Enter array size: 6
Element 1: 1
Element 2: 2
Element 2: 2
Element 3: 3
Element 4: 2
Element 5: 1
Frequency:
1: 2
2: 3
3: 1

What's going on

Count occurrences of each element.

Key Concepts:

Use dictionary to count
freq.get(element, 0) returns count or 0
Increment count for each occurrence

🔗Related Content

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