Can someone explain line per line what this program does? C++ #include <iostream

Question

Can someone explain line per line what this program does? C++

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    double m_user, m1=2, m2=10;
    int L_1, L_2;
    cout << "Enter the slope of your line: ";
    cin >> m_user;


    // check line 1 and line 2

    L_1 = abs(m_user - m1);
    L_2 = abs(m_user - m2);

    if (L_1 != 0 && L_2 != 0)
        cout << "Your line intersects both Line 1 and Line 2.";
    else if (L_1 != 0)
        cout << "Your line intersects Line 1.";
    else if (L_2 != 0)
        cout << "Your line intersects Line 2.";
    else
        cout << "Your line does not intersect Line 1 nor Line 2.";


    return 0;
}

Explanation / Answer

Answer:

This program is about slopes and coordinates.

Initially the slope of the line and its coordinates are declared.

Lines L_1 and L_2 are declared.

Then slope of the line is printed i,e m_user.

Then the two lines L_1 and L_2 are checked ( if both the lines L_1 and L_2 are not equal to zero, then the line will intersect both lines L_1 and L_2).

If only a single line among lines L_1 and L_2 are not equal to zero, then the line will intersect that line. Or it might be the case that both the lines L_1 and L_2 are equal to zero then the line will neither intersect L_1 nor L_2.

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