#13 Python :- Functions

 Functions:-

There are two types of functions in python :-

                    i) Defined function:- These are the functions whose work is already pre-defined .

                           e.q.: type() funtion , len() funtion etc. 

                   ii) Undefined function:- These are the functions whose work is not defined we have to write                                                              some code to execute such functions.

Let us see how we can defined a function:-

Note:- Defining a functions also means to creating a new function according to our need.

     Q:- Make a function to add 2 numbers.

      Code:-  def add_two(a,b):

                          return a+b          #we can also use print in place of return like:- print(a+b)

               num1=int(input("Enter the first number:- "))

               num2=int(input("Enter the second number:- "))

               num3=add_two(num1, num2)

               print(num3)

Output:- 

Enter the first number:- 15

Enter the second number:- 25

40

This is how we can create any function according to out need. 


Q:- Create a funtions in which you take the name as input and in reture you have to print the last character of the name.
Code:-
def last_name(a):
     return a[len(a)-1]  #reture a[-1]
num1=input("Enter your name:- ")
print(last_name(num1))
Output:- 
               Enter your name:- Gurpreet
               t
Q:- Create a function in which take a number as an input and print it is even or odd.
def odd_even(a):
      if a%2==0:
          print(f"{a} is even")
      else:
          print(f"{a} is odd")


num1=int(input("Enter the number:- "))
odd_even(num1)
OR
def odd_even(a):
      if a%2==0:
          return f"{a} is even"
      else:
          return f"{a} is odd"


num1=int(input("Enter the number:- "))
print(odd_even(num1))
OR
def odd_even(a):
      if a%2==0:
          return f"{a} is even"
      return f"{a} is odd"

num1=int(input("Enter the number:- "))
print(odd_even(num1))


Output:-
Enter the number:- 18
18 is even

Q3: Define a function for check number is even or odd. If number is even print true and for odd print odd.
def is_even(a):
      if a%2==0:
          return True
      return False

num1=int(input("Enter the number:- "))
print(is_even(num1))

 OR
def is_even(a):
      return a%2==0

num1=int(input("Enter the number:- "))
print(is_even(num1))
Output:-
Enter the number:- 26  #press Enter
True

Q4:- Create a function in which you have to take 2 numbers as input and print the greater number.
def big(a,b):
     if a>b:
          return a
     return b
num1,num2 = input("Enter 2 numbers separated by comma:- ") .split(",")
num1=int(num1)
num2=int(num2)
print(f"The greater number :{big(num1,num2)}")
Output:-
Enter 2 numbers separated by comma:- 36,45  #press Enter
The greater number :45

Q5:- Function for find greatest in 3 numbers
def big(a,b,c):
     if a>b and a>c:
          return a
     elif b>a and b>c:
          return b
     return c

num1= int(input("Enter the 1st number:- "))
num2=int(input("Enter the second number:- "))
num3=int(input("Enter the third number:- "))
print(big(num1,num2,num3))

Output:-

Enter the 1st number:- 25

Enter the second number:- 99

Enter the third number:- 102

102


Functions inside function:-

We can call one function into another .

e.q. like above problem Q5 we can also create it by using Q4

Code:-  

def big(a, b):
     if a > b:
          return a
     return b

def greater(a, b, c):
     greatest = big(a, b)      
     return big(greatest, c) 
     #WE can also use:- return big(big(a, b), c)

num1 = int(input("Enter the first number:- "))
num2 = int(input("Enter the second number:- "))
num3 = int(input("Enter the third number:- "))

print(greater(num1, num2, num3))

Output:-

Enter the first number:- 10

Enter the second number:- 5

Enter the third number:- 25

25

Q6:- Create a function is_palindrome in which you have to check weather the word is palindrome or not.

def is_palindrome(a):
     return a==a[::-1]
temp=1
while True:
     name=input("Enter the word:- ")
     if is_palindrome(name)==True:
          print(f"You got {is_palindrome(name)} in your {temp} attempt")
          break
     print("Sorry! Try Again")
     temp+=1
     continue

Output:-

Enter the word:- madhu

Sorry! Try Again

Enter the word:- gurpreet

Sorry! Try Again

Enter the word:- monu

Sorry! Try Again

Enter the word:- mom

You got True in your 4 attempt







Comments

Post a Comment

Popular posts from this blog

#4 Python :- Variables

  What is variable?  Since it we are talking about variable so it can be anything can be a number ,decimal, word or even a line etc. It has no fix value. In simple words, it is like a container which is used for storing different data values. We can understand a variable by example:- e.q.  #Declaring a variable         #Suppose variable are Var1, Var2, Var3             Var1="Gurpreet Singh"            Var2= 50            Var3= 2.5         # We can know the types of variable by using syntax type()              print(type(Var1)) ---> str() . It is string type.            print(type(Var2)) ---> int(). It is integer type.            print(type(Var3)) ---> float().   Now let us move on next step which is  inter-converting ...
Read more

#3 Python :- Comments, Printing First Statement and Escape sequences:-

 After knowing about mathematically calculation using python we come to next which are comments. Comments? These are syntax where are used to explain the python god to any other person, so that it is easy for others to work on such code and they can be able to understand.                 "Any fool can write code  that a  computer can understand .                   Good programmers  write code  that humans  can understand"                                                                  . Martin Fowler, 2008. So comments are very useful for understand and working on any code easily. There are two types of comments which are used in python :- a) Single line comment:- It is start with #hashtag.     ...
Read more