Python - Basic Programming (Functions)

1. Function to return arithamtic claculation

def arithmaticOperation(a,b):
  return a+b,a-b,a*b,a/b    
  
arithmaticOperation(a=4,b=2)
(6, 2, 8, 2.0)

2. Swap two values

def swapvalues(a,b):
  a,b=b,a
  return a,b
  
swapvalues(5,6)
(6, 5)

3. Function return String

#Method 1 - 
def return_string(num):
  print(type(num))
  if type(num) is not str:
    return str(num)
  else:
    return num
    
 #Method 2 -   
 def convert_to_string(my_input):
  print(type(my_input))
  print(my_input)
  is_numeric = isinstance(my_input, (float, int))
  if is_numeric:
      return str(my_input)
  else:
    return my_input
    
return_string(num=5)
'5'

type(return_string(num=5))
type(return_string('Fusion Forest'))

4. Function to get Area of triangle

def triangle_area(b,h):
  return .5*b*h
  
triangle_area(10,5)
25.0

def triangle_area():
  b = float(input("Enter base of triangle : "))
  h = float(input("Enter height of triangle : "))
  return .5*b*h

triangle_area()

Enter base of triangle : 2
Enter height of triangle : 2 
2.0

5. Function to get the largest number

def largest_num(list_in):
  return max(list_in)
  
largest_num(list_in=[1,2,3,4,5])
5

6. Function removing duplicates

def removeDuplicate(list_in):
  return(set(list_in))
  
removeDuplicate(list_in=[1,1,1,1,1,1,1,1,2,2,2,3,3,4,4,5])
{1, 2, 3, 4, 5}

7. Function to sum the whole list

def sumList(list_in):
  return sum(list_in)
  
sumList(list_in=[1,1,1,1,1,1,1,1,2,2,2,3,3,4,4,5])
33

8. Function reversing the String

#Method 1 - 
def reverseString(mstr):
  new_str = ""
  for i in mstr:
     new_str = i + new_str
  return new_str
  
#Method 2 -
def reverseString(mstr):
  return mstr[::-1]
  
reverseString("Fusion Forest")
tseroF noisuF

9. Factorial Function -

def factorial(num):
    fact=1
    for i in range(1, num+1):
        fact *= i
    return fact
    
 factorial(5)
 120