HackerRank Hands-on - Using float

Python - Using Float 1

 

Sanjay is trying to help vijay to find the Area of a Triangle. But for some reason he is trying to find some relation between area and pi. let's help him find that based on the condition below.

Function `triangle` takes three parameters called `n1`,'n2' as float and 'n3' as integer.

• Formula for
  • Area:(n1*n2) /2
• Return both values Area and Pi rounded off to 'n3' decimal places.

NOTE: You can get the value of pi from math module.

 

Input Format for Custom Testing:

 

Input from stdin will be processed as follows and passed to the function.

 

• The first line contains an float n1, the Height of the triangle.
• The second line contains an float n2, the base of the triangle.
• The third line contains an integer 'n3' which specifies the number of decimal places to be rounded off.

 

Sample Case 0

Sample Input

STDIN      Function
-----      --------
9       →  n1 = 9
5       →  n2 = 5
4       →  n3 = 4

 

Sample Output

(22.5, 3.1416)

Explanation

• Because the value of Area stops at one decimal place it stops at 5, but for pi it returns to 4 decimal places which is the value of n3.

 

#!/bin/python3

import math

import os

import random

import re

import sys

#

# Complete the 'tria' function below.

#

# The function is expected to return an INTEGER.

# The function accepts following parameters:

#  1. FLOAT n1

#  2. FLOAT n2

#  3. INTEGER n3

#

def triangle(n1, n2, n3):

    # Write your code here

    
    import math

    area = (n1*n2)/2

    area = round(area,n3)

    pi_value =math.pi

    pi_value = round(pi_value,n3)

    return(area, pi_value)

if __name__ == '__main__':

    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    n1 = float(input().strip())

    n2 = float(input().strip())

    n3 = int(input().strip())

    result = triangle(n1, n2, n3)

    fptr.write(str(result) + '\n')

    fptr.close()