Slope of perpendicular to line

You are given the slope of one line (m₁) and you have to find the slope of another line which is perpendicular to the given line.

Examples:  

Input : 5
Output : Slope of perpendicular line is : -0.20

Input : 4
Output : Slope of perpendicular line is : -0.25

Suppose we are given two perpendicular line segments AB and CD. The slope of AB is m₁ and line CD is m₂ .  

m₁ * m₂ = -1 
From above, we can say 
m₂ = – 1/( m₁ ) . 

How does above formula work?
Let slope of line AB be m1 and we need to find slope of line CD. Below diagram gives an idea about working of formula.

C++

// C++ program find slope of perpendicular line
#include <bits/stdc++.h>
using namespace std;

// Function to find
// the Slope of other line
double findPCSlope(double m)
{
    return -1.0 / m;
}

int main()
{
    double m = 2.0;
    cout << findPCSlope(m);
    return 0;
}

Java

// Java program find slope of perpendicular line

import java.io.*;
import java.util.*;

class GFG {

    // Function to find
    // the Slope of other line
    static double findPCSlope(double m)
    {
        return -1.0 / m;
    }

    public static void main(String[] args)
    {

        double m = 2.0;
        System.out.println(findPCSlope(m));
    }
}

Python3

# Python 3 program find
# slope of perpendicular line

# Function to find
# the Slope of other line
def findPCSlope(m):

    return -1.0 / m

m = 2.0
print(findPCSlope(m))

# This code is contributed
# by Smitha

C#

// C# Program to find Slope
// of perpendicular to line
using System;

class GFG {

    // Function to find
    // the Slope of other line
    static double findPCSlope(double m)
    {
        return -1.0 / m;
    }

    // Driver Code
    public static void Main()
    {

        double m = 2.0;
        Console.Write(findPCSlope(m));
    }
}

// This code is contributed by nitin mittal

PHP

<?php
// PHP program find slope
// of perpendicular line

// Function to find the
// Slope of other line
function findPCSlope($m)
{
    return -1.0 / $m;
}

    // Driver Code
    $m = 2.0;
    echo findPCSlope($m);

// This code is contributed by anuj_67
?>

Javascript

<script>

// Javascript program find slope
// of perpendicular line

// Function to find
// the Slope of other line
function findPCSlope(m)
{
    return -1.0 / m;
}

// Driver code
let m = 2.0;

document.write(findPCSlope(m));

// This code is contributed by jana_sayantan

</script>

Output:

-0.5

Time Complexity: O(1)

Auxiliary Space: O(1)