Python: Find the largest number where commas or periods are decimal points

Last update on March 22 2025 13:48:17 (UTC/GMT +8 hours)

Largest Number with Commas/Periods

Write a Python program to find the largest number where commas or periods are decimal points.

Input:
['100', '102,1', '101.1']
Output:
102.1

Visual Presentation:

Sample Solution-1:

Python Code:

# License: https://bit.ly/3oLErEI

# Define a function named 'test' that takes a list of strings 'str_nums' as input
def test(str_nums):
    # Use a generator expression to iterate through each string in 'str_nums'
    # Replace commas with periods and convert each string to a float, then find the maximum value
    return max(float(s.replace(",", ".")) for s in str_nums)

# Assign a specific list of strings 'str_nums' to the variable
str_nums = ["100", "102,1", "101.1"]

# Print the original list of strings 'str_nums'
print("Original list:")
print(str_nums)

# Print a message indicating the operation to be performed
print("Largest number where commas or periods are decimal points:")

# Print the result of the test function applied to the 'str_nums' list
print(test(str_nums))

Sample Output:

Original list:
['100', '102,1', '101.1']
Largest number where commas or periods are decimal points:
102.1

Flowchart:

Sample Solution-2:

Python Code:

# License: https://bit.ly/3oLErEI

# Define a function named 'test' that takes a list of strings 'str_nums' as input
def test(str_nums):
    # Initialize an empty list to store converted float values
    numbers = []
    
    # Iterate through each string in 'str_nums'
    for s in str_nums:
        # Replace commas with periods, convert the string to a float, and append to the 'numbers' list
        numbers.append(float(s.replace(",", ".")))
    
    # Sort the 'numbers' list in ascending order
    numbers.sort()
    
    # Return the largest number, which is the last element in the sorted list
    return numbers[-1]

# Assign a specific list of strings 'str_nums' to the variable
str_nums = ["100", "102,1", "103.1"]

# Print the original list of strings 'str_nums'
print("Original list:")
print(str_nums)

# Print a message indicating the operation to be performed
print("Largest number where commas or periods are decimal points:")

# Print the result of the test function applied to the 'str_nums' list
print(test(str_nums))

Sample Output:

Original list:
['100', '102,1', '103.1']
Largest number where commas or periods are decimal points:
103.1

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to parse a list of number strings where commas and periods are used as decimal points and determine the largest value.
• Write a Python program to convert strings with mixed decimal separators into floats and find the maximum.
• Write a Python program to normalize number strings with commas or periods as decimals and output the highest numerical value.
• Write a Python program to use regular expressions to extract numbers from strings with varying decimal delimiters and determine the largest one.

Python Code Editor :

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