LN2 Archives - Lena Design

JavaScript provides 8 mathematical constants that can be accessed as Math properties:

E – the JavaScript E property returns the Euler’s number and the base of natural logarithms (approx. 2.718).

Syntax:

Math.E

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="mathE()">Try it</button>
<p id="example-1"></p>

<script>
function mathE() {
  document.getElementById("example-1").innerHTML = Math.E;
}
</script>

</body>
</html>

Output:

Click the button to display Euler’s number.

LN2 – the JavaScript LN2 property returns the natural logarithm of 2 (approx. 0.693).

Syntax:

Math.LN2

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="ln2()">Try it</button>
<p id="example-2"></p>

<script>
function ln2() {
  document.getElementById("example-2").innerHTML = Math.LN2;
}
</script>

</body>
</html>

Output:

Click the button to display the natural logarithm of 2.

LN10 – the JavaScript LN10 property returns the natural logarithm of 10 (approx. 2.302).

Syntax:

Math.LN10

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="ln10()">Try it</button>
<p id="example-3"></p>

<script>
function ln10() {
  document.getElementById("example-3").innerHTML = Math.LN10;
}
</script>

</body>
</html>

Output:

Click the button to display the natural logarithm of 10.

LOG2E – the JavaScript LOG2E property returns the base-2 logarithm of E (approx. 1.442).

Syntax:

Math.LOG2E;

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="log2e()">Try it</button>
<p id="example-4"></p>

<script>
function log2e() {
  document.getElementById("example-4").innerHTML = Math.LOG2E;
}
</script>

</body>
</html>

Output:

Click the button to display the base-2 logarithm of E.

LOG10E – the JavaScript LOG10E property returns the base-10 logarithm of E (approx. 0.434).

Syntax:

Math.LOG10E

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="log10e()">Try it</button>
<p id="example-5"></p>

<script>
function log10e() {
  document.getElementById("example-5").innerHTML = Math.LOG10E;
}
</script>

</body>
</html>

Output:

Click the button to display the base-10 logarithm of E.

PI – the JavaScript PI property returns the ratio of a circle’s area to the square of its radius (approx.3.14).

Syntax:

Math.PI

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="pi()">Try it</button>
<p id="example-6"></p>

<script>
function pi() {
  document.getElementById("example-6").innerHTML = Math.PI;
}
</script>

</body>
</html>

Output:

Click the button to display PI.

SQRT1_2 – the JavaScript SQRT1_2 property returns the square root of 1/2 (approx. 0.707).

Syntax:

Math.SQRT1_2

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="sqrt()">Try it</button>
<p id="example-7"></p>

<script>
function sqrt() {
  document.getElementById("example-7").innerHTML = Math.SQRT1_2;
}
</script>

</body>
</html>

Output:

Click the button to display the square root of 1/2.

SQRT2 – the JavaScript SQRT2 property returns the square root of 2 (approx. 1.414).

Syntax:

Math.SQRT2

Example:

<!DOCTYPE html>
<html>
<body>

<button onclick="sqrt2()">Try it</button>
<p id="example-8"></p>

<script>
function sqrt2() {
  document.getElementById("example-8").innerHTML = Math.SQRT2;
}
</script>

</body>
</html>

Output:

Click the button to display the square root of 2.

Enjoy coding!