Python if... Else

Python Conditions and If statements

Python supports the usual logical conditions from mathematics:

• Equals: a == b
• Not Equals: a != b
• Less than: a < b
• Less than or equal to: a ⇐ b
• Greater than: a > b
• Greater than or equal to: a >= b

An “if statement” is written by using the if keyword.

a = 33
b = 55
if b > a:
	print("b is greater than a")
# b is greater than a

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Elif

The elif keyword is Python’s way of saying “if the previous conditions were not true, then try this condition”.

a = 33
b = 33
if b > a:
	print("b is greater than a")
elif a == b:
	print("b equal to a")
 
# a and b are equal

---

Else

The else keyword catches anything which isn’t caught by the preceding conditions.

a = 200  
b = 33  
if b > a:  
  print("b is greater than a")  
elif a == b:  
  print("a and b are equal")  
else:  
  print("a is greater than b")
 
# a is greater than b 

Short hand if

if a > b : print("a is greater than b")

---

Short hand if else

a = 2  
b = 330  
print("A") if a > b else print("B")

a = 330  
b = 330  
print("A") if a > b else print("=") if a == b else print("B")