Python Classroom notes 06/Mar/2026

Using functions

• python allows to call functions by passing arguments
  • postionally
  • named
• Consider the following function

def add(a: int|float, b: int|float) -> int|float:
    """Returns sum of two numbers

    Args:
        a (int|float):
        b (int|float):

    Returns:
        int|float: Return sum of two numbers
    """
    return a + b

• Calling arguments by position

add(1,2)

• Calling arguments by name

add(b=2, a=1)

• Optional arguments: i.e. arguments with default values
• Refer Here for the notebook with functions examples added

Create a function

• Lets write a program which prints n = 3

  *
 ***
*****

• if we pass n = 5

    *
   ***
  *****
 *******
*********

• Code

def print_triangle(size=5,symbol='*'):
    index = 0
    while index < size:
        count = 2*index + 1
        space_count = size - index - 1
        print(" "*space_count, end="")
        print(symbol*count)
        index = index + 1