Python Exercise: Count the elements in a list until an element is a tuple

Last update on March 28 2025 13:04:24 (UTC/GMT +8 hours)

24. Count Elements in a List Until an Element is a Tuple

Write a Python program to count the elements in a list until an element is a tuple.

Sample Solution:

Python Code:

# Create a list 'num' that contains a sequence of numbers and a tuple.
num = [10, 20, 30, (10, 20), 40]

# Initialize a counter 'ctr' to keep track of the index of the first tuple in the list.
ctr = 0

# Iterate through each element 'n' in the 'num' list.
for n in num:
    # Check if 'n' is an instance of a tuple.
    if isinstance(n, tuple):
        # If 'n' is a tuple, exit the loop.
        break
    # Increment the counter 'ctr' for non-tuple elements.
    ctr += 1

# Print the value of the 'ctr' variable, which represents the index of the first tuple in the list.
print(ctr) 

Sample Output:

3 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to iterate over a list and count elements until the first tuple is encountered.
• Write a Python program to use a loop to traverse a list and break the loop when an element of type tuple is found, returning the count.
• Write a Python program to implement a function that returns the index of the first tuple in a list.
• Write a Python program to use enumerate() to count elements until an element is a tuple and then output the count.

Python Code Editor:

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