Switch Case statement

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Average time to solve is 15m

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Problem statement

Programming languages have some conditional / decision-making statements that execute when some specific condition is fulfilled.

Switch-case is one of the ways to implement them.

Choice 1 is to find the area of a circle having radius 'r'.

Choice 2 is to find the area of a rectangle having dimensions 'l' and 'b'.

You are given the choice 'ch' and an array 'a'.

If ‘ch’ is 1, ‘a’ contains a single number ‘r’. If ‘ch’ is 2, ‘a’ contains 2 numbers, ‘l’ and ‘b’.

Consider the choice and print the appropriate area.

Example :

Input: ‘ch’ = 2 and ‘a’ = [3, 2]

Output: area = 6

Explanation: Since the choice ‘ch’ is 2, we have to print the area of the rectangle having ‘l’ = 3 and ‘b’ = 2, which is 6.

Detailed explanation ( Input/output format, Notes, Images )

Input Format :

The first line contains an integer ‘ch’, the choice.

If ‘ch’ is 1, the second line contains 1 number ‘r’, the radius of the circle.
If ‘ch’ is 2, the second line contains 2 numbers, ‘l’ and ‘b’, the dimensions of the rectangle.

Output Format :

The only line of the output contains a floating point number representing the area of the shape.

Note :

You do not need to print anything; it has already been taken care of. Just return the area calculated. It will be rounded off to 5 decimal places and printed.

Sample Input 1:

2
3 2

Sample Output 1:

6.00000

Explanation of sample input 1 :

Since the choice ‘ch’ is 2, we have to print the area of the rectangle having ‘l’ = 3 and ‘b’ = 2, which is 6.

Sample Input 2:

1
3

Sample Output 2:

28.27433

Explanation of sample input 2 :

Since the choice ‘ch’ is 1, we have to print the area of the circle having ‘r’ = 3, which is approximately 28.274333882308138. Rounded off to 5 decimal places, we get 28.27433.

Expected time complexity :

The expected time complexity is O(1).

Constraints :

1 <= ‘ch’ <= 2
1 <= ‘r’ <= 100
1 <= ‘l’, ‘b’ <= 100

Time limit: 1 second

Console