Logic Building/Phase 4 - Level 2: Searching & Counting Logic/Program

Find Last Occurrence

Find index of last occurrence of element.

Logic BuildingIntermediate

Logic Building

# Take array
n = int(input("Enter array size: "))
arr = []
for i in range(n):
    arr.append(int(input(f"Element {i+1}: ")))

x = int(input("Enter element to find: "))

# Find last occurrence
last_index = -1
for i in range(len(arr)):
    if arr[i] == x:
        last_index = i

if last_index != -1:
    print(f"Last occurrence at index: {last_index}")
else:
    print("Element not found")

Output

Enter array size: 5
Element 1: 10
Element 2: 20
Element 3: 30
Element 4: 20
Element 5: 40
Enter element to find: 20
Last occurrence at index: 3

Iterate and track last matching index.

Key Concepts:

Loop through array
Update last_index when found
Track last occurrence

Find First Occurrence

Check Uniqueness