#6 Python Tutorial for Beginners

Hello Guys ,  

  In previous tutorial you learned about Dictionary , Nested Dictionary , Dictionary Method , set and set Method in python.

 In this tutorial you will learn below points:

• if statement
• if-else statement
• Nested if-else statement
• elif statement
• pass statement

Let's get started.

If Statement

• if statement is the simple decision making statement.
• if certain condition is met then a true block statement is executed. 
• if statement is written using "if" keyword.
• else statement is optional.

Example :

A = 10

if(A == 10):

    print("This is equal to 10")

#else statement is optional   

Output :

This is equal to 10

If-else Statement

• if certain condition is met then a true block statement is executed and otherwise else block executed.
• else block is optional. 

Example :

a = 20

b = 30

if (a > b):

    print(a ,"is greater than", b)

else:

    print(b ,"is greater than" ,a)    

Output :

30 is greater than 20

Nested If-else Statement

• if statement inside another if statement called "nested if-else statement". 
• In this statement (outside)if condition is check if it's true then inside if statement condition check and it's true then inside if statement block executed otherwise inside else statement block executed.
• (outside) if statement condition is false then outside else block executed.

 Example :

#find maximum number

A = 20

B = 50

C = 40

if(A > B):

    if(A > C):

        print(A,"is maximum number")

    else:

        print(C , "is maximum number")    

else:

    if(B > C):

        print(B ,"is maximum number")

    else:

        print(C , "is maximum number")    

 

Output :

50 is maximum number

elif Statement

• In this statement you can create multiple condition options. 
• In this statement if condition is check if it's false then check another condition if that condition is true then statement executed . if no one condition is true then else block excuted. 
• elif statement create using "elif" keyword. we can create elif statement after if statement.

Example :

A = 30

if (A > 20):

    print(A , "is greater than given number ")

elif (A == 20):

    print(A , "is equal to given number ")

else:

    print(A , "is less than to given number")

Output :

30 is greater than given number

Pass Statement

• pass is null statement.
• pass  statement does not effect to result.
• if you create if statement with no content and  use pass statement avoid getting an error.
• pass statement actually use for if you want to implement in future. 

Example :

'''if statement cannot be empty. 

  But you have some reason you create 

  if statement with no content. put in the 

  pass statement avoid getting an error.'''

A = 2

B = 5

if(A > B):

   pass

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