Python input() Function

Program 1

print("Enter First No")
a=int(input())
print("Enter Second No")
b=int(input())
c=a+b
print(c)

Program 2

a=int(input("Enter First Number"))
b=int(input("Enter Second Number"))

print("Before Swaping ",a ," ",b)
#c=a
#a=b
#b=c

#a=a+b
#b=a-b
#a=a-b

a,b=b,a

print("After Swaping ",a ," ",b)   

Program 3

a,b=input("Enter two Number").split(',')
a=int(a)
b=int(b)
c=a+b
print("Addition is : ",c)

Program 4

r=float(input("Enter redious"))
A=3.14*r*r
print("Area is ",A)