Question

Write a program to calculate area of a circle whose radius is given by the user

Answer 1

Answer:

it's π × radius^2

Explanation:

the formula for calculating the area of circle is πr^2

Answer 2

Answer:

r=float(input('Enter the radius of the circle:'))

a=3.14*r**2

print("The area of the circle is",a)

Explanation:

We know that,

Area of circle (a) = πr²  where r is the radius of the circle and π is a constant whose value is 3.14.

The float( )function: It is a type of built-in functions which converts the specified value into a decimal number.

**n: It performs exponential power calculation on operators and assign value to the left operand where n is the number which is raised to the power. Example : 2**3=8.

More to know:

• Python name of this language was derived from the British comedy series "Monty Python's Flying Circus".
• It is a case sensitive language i.e. ability to distinguish between upper and lower case. a is different from A.
• Python is slow because it is too flexible and the machine would need to do a lot of referencing to make sure what the definition of something is.