Program:
#1.function with no parameters and with no return type
def sum():
x=10
y=20
z=x+y
print("sum=",z)
sum()
#2.function with parameters and with no return type
def sum1(a,b):
c=a+b
print("sum=",c)
sum1(30,40)
#3.function with parameters and with return type
def sum2(p,q):
r=p+q
return r
s=sum2(50,60)
print("sum=",s)
#4.function with no parameters and with return type
def sum3():
x=70
y=80
z=x+y
return z
m=sum3()
print("sum=",m)
Output:
