#PYTHON(DAY14)if-elif-else, Nested if

#PYTHON(DAY14)

Continuation of conditional statements

if-elif-else

• primary block will be ‘if’, this will evaluate the c.e and if it is true,
• it will execute code-block under ‘if’ statement. if the c.e turns out to false, then it will go to first ‘elif’ block
• ‘elif’ c.e is validated and if it is True, the code-block under this ‘elif’ will be executed, if not, it will go to next elif block and so on till it validates all the elif blocks.
• if none of the ‘if’, ‘else’ c.e if turns to be True, then else block will be executed

flow chart of if-elif-else:

if-elif-else

Example

z = int(input('enter marks:')) 


if z>80:
    print('first class with distinction')
    
elif z>60 and z<80:
    print('first class')
    
elif z>35 and z<60:
    print('second class')
    
elif z<35:
    print('fail')

And the output is:

enter marks:46
second class

Nested if

• if inside the if

flow chart of Nested if:

nested if

Example

marks = int(input('enter marks:'))

c = time.time()
a = time.time()
if marks>=35:
    if marks<60:
        print('second class')
    elif marks>60 and marks<80:
        print('first class')
    else:
        print('fwd')
else:
    print('fail')
        
d = time.time()  
b = time.time()

And the output is:

enter marks:67
first class