Next
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

Find Common Elements

Find elements present in both arrays.

IntermediatePhase 4 - Level 4: Aggregation & ComparisonExample 4 of 10
find-common-elements.py
1# Take arrays
2n1 = int(input("Enter size of first array: "))
3arr1 = []
4for i in range(n1):
5    arr1.append(int(input(f"Array1 element {i+1}: ")))
6

7n2 = int(input("Enter size of second array: "))
8arr2 = []
9for i in range(n2):
10    arr2.append(int(input(f"Array2 element {i+1}: ")))
11

12# Find common elements
13common = []
14for element in arr1:
15    if element in arr2 and element not in common:
16        common.append(element)
17

18print(f"Common elements: {common}")

Output

Enter size of first array: 4
Array1 element 1: 1
Array1 element 2: 2
Array1 element 3: 3
Array1 element 4: 2
Enter size of second array: 3
Array2 element 1: 2
Array2 element 2: 3
Array2 element 3: 4
Common elements: [2, 3]

What's going on

Check each element of first array in second.

Key Concepts:

Iterate through first array
Check if exists in second
Avoid duplicates

🔗Related Content

PreviousMerge Two ArraysNextElements in A Not in B