Greatest num finder

a = int(input("Enter first number"))
b = int(input("Enter second number"))
c = int(input("Enter third number"))
def funct(a,b,c):
    if a>b and a>c:
        return a
    if b>a and b>c:
        return b
    if c>b and c>a:
        return c
print(funct(a,b,c),"Is the greatest number")