Tutorial Gateway

JavaScript ATAN

by

The JavaScript ATAN function is a Math function, which is used to calculate the trigonometry Arc Tangent for the specified expression. Arc Tangent also called the inverse of a TANGENT function. The syntax of the JavaScript ATAN Function is

Math.atan(number);

JavaScript ATan Function Example

In this JavaScript example, We are going to find the Arc Tangent values of different data types and display the output

<!DOCTYPE html>
<html>
<head>
    <title> JavaScript ATAN Function </title>
</head>
<body>
  <h1> JavaScript ATAN Function </h1>
  <p id = "Pos"></p>
  <p id = "Neg"></p>
  <p id = "Dec"></p>
  <p id = "Neg_Dec"></p>
  <p id = "Str"></p>
  <p id = "Exp"></p>
  <p id = "Null"></p>
  <p id = "Multi"></p>
 <script>
    document.getElementById("Pos").innerHTML = Math.atan(1);
    document.getElementById("Neg").innerHTML = Math.atan(-1);
    document.getElementById("Dec").innerHTML = Math.atan(0.45);
    document.getElementById("Neg_Dec").innerHTML = Math.atan(-0.75);
    document.getElementById("Str").innerHTML = Math.atan("JavaScript");
    document.getElementById("Null").innerHTML = Math.atan(null);
    document.getElementById("Multi").innerHTML = Math.atan(25 + 55 - 77);
  </script>
</body>
</html>

OUTPUT

JavaScript ATAN Function

ANALYSIS

String Value in ATAN Function returns NaN (Not a Number)

document.getElementById("Str").innerHTML = Math.atan("JavaScript");

Null Values in JS ATAN Function returns Zero as output

document.getElementById("Null").innerHTML = Math.atan(null);