JS Practice — Built-in Objects

Math.atan2(0, -1) Equals PI

📖 Usage Example

// Angle from positive x-axis to point (x, y)
Math.atan2(1, 1)   // → 0.7853... (π/4)
Math.atan2(0, 1)   // → 0

Use Math.atan2(y, x) to compute the angle of a point from the origin, correctly handling all quadrants.

Math.atan2(y, x)

Math.atan2(0, -1) returns Math.PI (180°, pointing in the negative x direction).

Challenge: Verify that Math.atan2(0, -1) equals π.

💡 Hints (2)