CoffeeScript Math - atan()

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Description

The atan() method accepts a number and returns its arctangent value in radians. This method returns a numeric value between -pi/2 and pi/2 radians.

Syntax

Given below is the syntax of atan() method of JavaScript. We can use the same method in the CoffeeScript code.

Math.atan( x )

Example

The following example demonstrates the usage of the atan() method in CoffeeScript. Save this code in a file with name math_atan.coffee.

value = Math.atan -1
console.log "The arc tangent value of -1 is : " + value 
         
value = Math.atan null
console.log "The arc tangent value of null is : " + value 
         
value = Math.atan 20 
console.log "The arc tangent value of 20 is : " + value

Open the command prompt and compile the .coffee file as shown below.

c:\> coffee -c math_atan.coffee

On compiling, it gives you the following JavaScript.

// Generated by CoffeeScript 1.10.0
(function() {
  var value;

  value = Math.atan(-1);

  console.log("The arc tangent value of -1 is : " + value);

  value = Math.atan(null);

  console.log("The arc tangent value of null is : " + value);

  value = Math.atan(20);

  console.log("The arc tangent value of 20 is : " + value);

}).call(this);

Now, open the command prompt again, and run the CoffeeScript file as shown below.

c:\> coffee math_atan.coffee

On executing, the CoffeeScript file produces the following output.

The arc tangent value of -1 is : -0.7853981633974483
The arc tangent value of null is : 0
The arc tangent value of 20 is : 1.5208379310729538