JavaScript: Calculate degrees between 2 points with inverse Y axis

JavaScript Math: Exercise-27 with Solution

Calculate Degrees Between Two Points

Write a JavaScript function to calculate degrees between 2 points with the inverse Y axis.

Test Data :
console.log(pointDirection(1, 0, 12, 0));
0
console.log(pointDirection(1, 0, 1, 10));
90

Sample Solution:

JavaScript Code:

// Define a function named pointDirection that calculates the direction angle from point 1 to point 2.
function pointDirection(x1, y1, x2, y2) {
    // Calculate the angle using arctangent, and convert it from radians to degrees.
    return Math.atan2(y2 - y1, x2 - x1) * 180 / Math.PI;
}

// Output the result of calculating the direction angle from (1, 0) to (12, 0) to the console.
console.log(pointDirection(1, 0, 12, 0));
// Output the result of calculating the direction angle from (1, 0) to (1, 10) to the console.
console.log(pointDirection(1, 0, 1, 10));

Output:

0
90

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-27 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that calculates the angle in degrees between two points in a 2D plane using inverse trigonometry.
• Write a JavaScript function that computes the directional bearing from one point to another, normalizing the angle between 0 and 360 degrees.
• Write a JavaScript function that calculates the angle between two points and accounts for the inverted Y-axis in screen coordinates.
• Write a JavaScript function that determines the angle between two coordinates and rounds the result to the nearest whole degree.

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