# Slope of the line parallel to the line with the given slope

Given an integer **m** which is the slope of a line, the task is to find the slope of the line which is parallel to the given line.

**Examples:**

Input:m = 2

Output:2

Input:m = -3

Output:-3

**Approach:**

Let **P** and **Q** be two parallel lines with equations **y = m1x + b1**, and **y = m2x + b2** respectively.Here **m1** and **m2** are the slopes of the lines respectively. Now as the lines are parallel, they don’t have any intersecting point, and hence there will be no system of solutions for the lines. So, let us try to solve the equations,

For

y,m1x + b1 = m2x + b2

m1x – m2x = b2 – b1

x(m1 – m2) = b2 – b1

The only way there can be no solution forxis form1 – m2to be equal to zero.

m1 – m2 = 0

This gives usm1 = m2and the slopes are equal.

Below is the implementation of the above approach:

## C++

`// C++ implementation of the approach ` `#include <bits/stdc++.h> ` `using` `namespace` `std; ` ` ` `// Function to return the slope ` `// of the line which is parallel to ` `// the line with the given slope ` `double` `getSlope(` `double` `m) ` `{ ` ` ` `return` `m; ` `} ` ` ` `// Driver code ` `int` `main() ` `{ ` ` ` `double` `m = 2; ` ` ` `cout << getSlope(m); ` ` ` ` ` `return` `0; ` `} ` |

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## Java

`// Java implementation of the approach ` `class` `GfG ` `{ ` ` ` `// Function to return the slope ` `// of the line which is parallel to ` `// the line with the given slope ` `static` `double` `getSlope(` `double` `m) ` `{ ` ` ` `return` `m; ` `} ` ` ` `// Driver code ` `public` `static` `void` `main(String[] args) ` `{ ` ` ` `double` `m = ` `2` `; ` ` ` `System.out.println(getSlope(m)); ` `} ` `} ` ` ` `// This code is contributed by Code_Mech. ` |

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## Python3

`# Python3 implementation of the approach ` ` ` `# Function to return the slope ` `# of the line which is parallel to ` `# the line with the given slope ` `def` `getSlope(m): ` ` ` ` ` `return` `m; ` ` ` `# Driver code ` `m ` `=` `2` `; ` `print` `(getSlope(m)); ` ` ` `# This code is contributed ` `# by Akanksha Rai ` |

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## C#

`// C# implementation of the approach ` `class` `GFG ` `{ ` ` ` `// Function to return the slope ` `// of the line which is parallel to ` `// the line with the given slope ` `static` `double` `getSlope(` `double` `m) ` `{ ` ` ` `return` `m; ` `} ` ` ` `// Driver code ` `static` `void` `Main() ` `{ ` ` ` `double` `m = 2; ` ` ` `System.Console.Write(getSlope(m)); ` `} ` `} ` ` ` `// This code is contributed by mits ` |

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## PHP

`<?php ` `// PHP implementation of the approach ` ` ` `// Function to return the slope ` `// of the line which is parallel to ` `// the line with the given slope ` `function` `getSlope(` `$m` `) ` `{ ` ` ` `return` `$m` `; ` `} ` ` ` `// Driver code ` `$m` `= 2; ` `echo` `getSlope(` `$m` `); ` ` ` `// This code is contributed by Ryuga ` `?> ` |

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**Output:**

2

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