Working with Functions in Python Class 12 Solutions

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Working with Functions in Python is a key chapter in Class 12 Computer Science. It teaches students how to define and call functions, pass arguments, return values, and understand variable scope. Mastering functions is essential for writing clean and modular Python programs.

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Working with Functions in Python Class 12 Solutions

1. What do you understand by local and global scope of variables?

Answer – A global variable is one that is accessible outside and inside the function; it is also known as a global scope. A local variable is one that is only accessible inside the function.

Example of Global Variable:

x = 20  # Global variable

def my_function():
    print(x)  # Accessible inside the function

my_function()
print(x)  # Accessible outside the function too

Example of Local Variable:

def my_function():
    x = 10  # Local variable
    print(x)  # Accessible inside the function

my_function()
print(x)  # This will raise an error because x is local to my_function.

3. Differentiate between the round() and floor() functions with the help of suitable example.

Answer – The function floor() is used to convert to the lowest lower whole number, whereas the function round() is used to convert a fractional number into a whole as the nearest next. For example, round (5.8) = 6, round (4.1) = 5, and floor (6.9) = 6, floor (5.01) = 5.

import math

print(round(5.8))   # Output: 6
print(round(4.1))   # Output: 4
print(math.floor(6.9))  # Output: 6
print(math.floor(5.01)) # Output: 5

4. What is the difference between input() and raw_input()?

Answer – In Python, raw_input() and input() were two functions used for taking input from the users. raw_input() is used in Python to take user input as a string, whereas the input() function takes user input based on the input type. For example, if the user has entered a number, then Python interprets it as an integer rather than a string.

5. What is a function in python?

Answer – A function is a reusable block of code that performs a specific task. The function helps to organise the code efficiently and reduce repetition of code. Instead of writing the same code multiple times, you can define a function, and you can reuse it multiple times.

6. Write and explain the types of functions supported by python.

Answer – Python functions are categorised into two main types: built-in functions and user-defined functions. Built-in functions come with several pre-defined functions which perform various tasks such as input handling, mathematical operations and type conversion, etc. User-defined functions are created by programmers using the def keyword. These functions are helpful for organisation of the code and improving reusability.

7. Write a Python function to calculate the factorial of a number (a non-negative integer). The function accepts the number as an argument.

Answer –

def factorial(n):
    if n < 0:
        return 
    elif n == 0:
        return 1
    else:
        return n * factorial(n - 1)

n = int(input("Enter a non-negative integer: "))

print(f"Factorial of {n} is {factorial(n)}")

Output:
Enter a non-negative integer: 5
Factorial of 5 is 120

8. Write a Python function to find the Max of two numbers.
Answer –

def max_number(x, y):
    if x > y:
        return x
    else:
        return y

print(max_number(2, 5))  

Output: 
5

9. Write a program to create a function that takes two arguments, name and age, and print their value.

Answer –

def student(name, age):
     print(name, age)

student("Amit", 22)

Computer Science Class 12 Questions and Answers

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