Python if else and elif for condition check

Take care of indenting as you will get error. The code to be executed within if condition is to be indented to create a block of code.

x=10
y=20
if(x>y):
    print("x is greater than y")
else:
    print("y is greater than x")

Output is here

y is greater than x

Python if else and elif to execute code blocks based on condition checking True or False

Using elif

If the first if condition check fails then we can go for for one more check by using elif before using else.
if elif else condition check

x=10
y=20
if(x>y):
    print("x is greaeter than y")
elif(y>15):
    print("y is greater than 15")
    
else:
    print("y is greater than x but less than 15")

Output is here

y is greater than 15

What is the difference between else and elif ?

We don’t check any condition while using else, the code within else block is always executed once the (previous) if condition fails. In case of elif , one more condition is checked.
Read more how to use elif to get the grade from input mark.

Using Short code

x=10
y=20
if(y>x): print("x is greater than y")

Output is here

x is greater than y

This one is easy.

x=10
y=20
print("y is big") if(y>x) else print("x is big")

One liner if else

mark=45
status='Pass' if mark > 50 else 'Fail'
print(status) # Fail

Write one user defined function to filter odd and even numbers.

def my_check(x):
    return True if x%2==0 else False

Absolute value of input number

i=int(input("input a number "))
if(i<0):i=-i
print("Absolute value is : ",i)

Sort three user input numbers

Using logical operators and, or

#n1=int(input('First Number : '))
#n2=int(input('Second Number : '))
#n3=int(input('Third Number : '))
n1=27
n2=18
n3=39
if(n1>=n2 and n1>=n3):
  if(n2>=n3):
    print(n1,n2,n3)
  else:
    print(n1,n3,n2)  
if(n2>=n1 and n2>=n3):
  if(n1>=n3):
    print(n2,n1,n3)
  else:
    print(n2,n3,n1)  
if(n3>=n1 and n3>=n2):
  if(n1>=n2):
    print(n3,n1,n2)
  else:
    print(n3,n2,n1)

month='Feb'
if month=='Jan' or month=='Feb' or month=='March':
    print("This is last quarter of the Financial year")
else:
    print("Financial year is not ending now")

Output

This is last quarter of the Financial year

Using not

grade='A'
if not(grade=='A'):
    print("You are not in grade A ")
else:
    print("You are in A grade ")

Output

You are in A grade

Check Divisibility

i=int(input("Enter any number : "))
if (i%5==0):print("Number is divisible by 5")
else: print("Number is not divisible by 5")

High School Python ( part of Syllabus) View and Download if_else_elif ipynb file ( .html format )

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if else elif in Python

Using elif

What is the difference between else and elif ?

Using Short code

Absolute value of input number

Sort three user input numbers

Check Divisibility

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