C Program To Check In Which Quadrant The Point Lies

Lets write a C program to determine the position of point(x,y) on the graph of x and y axis.

Important: Always remember that, to specify a point, we always write x-axis value first and then the y-axis value. i.e., (x, y)

Related Read:
C Program To Check If Point Lies on x-axis or y-axis or Origin

Logic To Check The Position of the Point in the graph
We check for 9 conditions to determine the position of the user entered point in the graph.

1. Point lies on (0, 0): Origin
2. y = 0 and x > 0. i.e., x is positive: point lies on positive side of x-axis.
3. x = 0 and y > 0. i.e., y is positive: point lies on positive side of y-axis.
4. y = 0 and x < 0. i.e., x is negative: point lies on negative side of x-axis.
5. x = 0 and y < 0. i.e., y is negative: point lies on negative side of y-axis.
6. x > 0 and y > 0. i.e., both x and y are positive: point lies in First Quadrant.
7. x < 0 and y > 0. i.e., x is negative and y is positive: point lies in Second Quadrant.
8. x < 0 and y < 0. i.e., both x and y are negative: point lies in Third Quadrant.
9. x > 0 and y < 0. i.e., x is positive and y is negative: point lies in Forth Quadrant.

Expected Output for the Input

User Input:
Enter the point(x, y)
5
5

Output:
Point lies in First Quadrant

Video Tutorial: C Program To Check In Which Quadrant The Point Lies

Source Code: C Program To Check In Which Quadrant The Point Lies

#include < stdio.h >

int main()
{
    float x, y;

    printf("Enter the point(x, y)\n");
    scanf("%f%f", &x, &y);

    if(x == 0 && y == 0)
    {
        printf("Point lies on the Origin\n");
    }
    else if(y == 0 && x > 0)
    {
        printf("Point lies on positive x-axis\n");
    }
    else if(x == 0 && y > 0)
    {
        printf("Point lies on positive y-axis\n");
    }
    else if(y == 0 && x < 0)
    {
        printf("Point lies on negative x-axis\n");
    }
    else if(x == 0 && y < 0)
    {
        printf("Point lies on negative y-axis\n");
    }
    else if(x > 0 && y > 0)
    {
        printf("Point lies in First Quadrant\n");
    }
    else if(x < 0 && y > 0)
    {
        printf("Point lies in Second Quadrant\n");
    }
    else if(x < 0 && y < 0)
    {
        printf("Point lies in Third Quadrant\n");
    }
    else if(x > 0 && y <0)
    {
        printf("Point lies in Forth Quadrant\n");
    }

    return 0;
}

Output 1:
Enter the point(x, y)
0
0
Point lies on the Origin

Output 2:
Enter the point(x, y)
5
0
Point lies on positive x-axis

Output 3:
Enter the point(x, y)
-5
0
Point lies on negative x-axis

Output 4:
Enter the point(x, y)
0
5
Point lies on positive y-axis

Output 5:
Enter the point(x, y)
0
-5
Point lies on negative y-axis

Output 6:
Enter the point(x, y)
5
5
Point lies in First Quadrant

Output 7:
Enter the point(x, y)
-5
5
Point lies in Second Quadrant

Output 8:
Enter the point(x, y)
-5
-5
Point lies in Third Quadrant

Output 9:
Enter the point(x, y)
5
-5
Point lies in Forth Quadrant

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