Can you explain why none is printing in output?
In python indentation matters, Your Function Call is not Properly indented that is why it is not printing anything
def great(a,b,c):
if(a>b and a>c):
print("a is greater")
elif(b>a and b>c):
print("b is greater")
else:
print("c is greater")
a=great(12,3,1)
print(a)