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Function to Check Numeric Value in Python

In this exercise, you will develop a Python program that defines a function to check if a string represents an integer value. This exercise is perfect for practicing function definition, string manipulation, and conditional statements in Python. By implementing this function, you will gain hands-on experience in handling function definitions, string manipulation, and conditional statements in Python. This exercise not only reinforces your understanding of functions but also helps you develop efficient coding practices for managing user interactions.



Group

Mastering Functions in Python

Objective

Develop a Python program that defines a function to check if a string represents an integer value. This function can be used to determine whether a string like '1234' is a valid numeric value. If it is, the program will print a message saying 'It is a numerical value'.

Example Python Exercise

 Copy Python Code 
# Function to check if a string represents an integer value
def is_integer(value):
    # Try to convert the string to an integer
    try:
        int(value)  # Attempt to convert the string to an integer
        return True  # Return True if successful
    except ValueError:
        return False  # Return False if a ValueError occurs (i.e., not a valid integer)

# Example usage of the is_integer function
def main():
    # Take a string input from the user
    value = input("Enter a value: ")

    # Check if the input value is a valid integer
    if is_integer(value):
        print(f"It is a numerical value.")  # Print if it is a valid integer
    else:
        print(f"It is not a numerical value.")  # Print if it is not a valid integer

# Run the main function if the script is executed directly
if __name__ == "__main__":
    main()

 Output

Case 1:
Enter a value: 1234
It is a numerical value.

Case 2:
Enter a value: abc
It is not a numerical value.

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