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Showing content from https://developer.cdn.mozilla.net/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/E below:

Math.E - JavaScript | MDN

Math.E

Baseline Widely available

The Math.E static data property represents Euler's number, the base of natural logarithms, e, which is approximately 2.718.

Try it
function compoundOneYear(interestRate, currentVal) {
  return currentVal * Math.E ** interestRate;
}

console.log(Math.E);
// Expected output: 2.718281828459045

console.log((1 + 1 / 1000000) ** 1000000);
// Expected output: 2.718280469 (approximately)

console.log(compoundOneYear(0.05, 100));
// Expected output: 105.12710963760242
Value 𝙼𝚊𝚝𝚑.𝙴 = e ≈ 2.718 \mathtt{Math.E} = e \approx 2.718 Writable no Enumerable no Configurable no Description

Because E is a static property of Math, you always use it as Math.E, rather than as a property of a Math object you created (Math is not a constructor).

Examples Using Math.E

The following function returns e:

function getNapier() {
  return Math.E;
}

getNapier(); // 2.718281828459045
Specifications Browser compatibility See also

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