JavaScript: Convert an angle from degrees to radians

JavaScript Math: Exercise-33 with Solution

Convert Degrees to Radians

Write a JavaScript function to convert an angle from degrees to radians.

Test Data :
console.log(degrees_to_radians(45));
0.7853981633974483

Use Math.PI and the degree to radian formula to convert the angle from degrees to radians.

Sample Solution-1:

JavaScript Code:

// Define a function named degrees_to_radians that converts degrees to radians.
function degrees_to_radians(degrees)
{
  // Store the value of pi.
  var pi = Math.PI;
  // Multiply degrees by pi divided by 180 to convert to radians.
  return degrees * (pi/180);
}

// Output the result of converting 45 degrees to radians to the console.
console.log(degrees_to_radians(45));

Output:

0.7853981633974483

Visual Presentation:

Flowchart:

Sample Solution-2:

JavaScript Code:

/**
 * Function to convert degrees to radians.
 * @param {number} deg - The angle in degrees.
 * @returns {number} - The angle in radians.
 */
const degrees_to_radians = deg => (deg * Math.PI) / 180.0; // Convert degrees to radians using the formula: radians = (degrees * Math.PI) / 180
console.log(degrees_to_radians(45)); // Print the result of converting 45 degrees to radians
console.log(degrees_to_radians(90)); // Print the result of converting 90 degrees to radians

Output:

0.7853981633974483
1.5707963267948966

Live Demo:

See the Pen javascript-math-exercise-33 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that converts an angle in degrees to radians using the formula (degrees * Math.PI / 180).
• Write a JavaScript function that validates the input angle and converts it to radians, rounding to a specified precision.
• Write a JavaScript function that converts an array of degree values to radians in one go.
• Write a JavaScript function that implements the conversion without directly using Math.PI by approximating its value.

Improve this sample solution and post your code through Disqus.

Previous: Write a JavaScript function to calculate the percentage (%) of a number.
Next: Write a JavaScript function to convert radians to degrees.