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JavaScript - Math.E property example
7 points
The Math.E property returns e mathematical constant (2.718281828459045...).
e is called as Euler's number or as Napier's constant. However, it was discovered by Jacob Bernoulli. It is a mathematical constant used as the base of the natural logarithm.
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console.log( Math.E ); // 2.7182818284590452
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console.log( Math.exp(1) ); // 2.7182818284590454
console.log( Math.exp(2) ); // 7.389056098930655
console.log( Math.exp(3) ); // 20.085536923187668| Syntax | Math.E |
| Result | e number (2.718281828459045...). |
| Description |
|
To calculate e number following function with infinity series can be used - to get better precision infinite number of iterations with big precision numbers should be used.
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function computeE(iterations) {2
var e = 0;3
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for (var i = 0; i < iterations; ++i) {5
var divider = 1;6
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for (var j = 0; j < i; ++j) {8
divider *= (j + 1);9
}10
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e += (1 / divider);12
}13
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return e;15
}16
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console.log( computeE( 1 ) ); // 118
console.log( computeE( 2 ) ); // 219
console.log( computeE( 5 ) ); // 2.70833333333333320
console.log( computeE( 10 ) ); // 2.718281525573192221
console.log( computeE( 20 ) ); // 2.718281828459045522
console.log( computeE( 50 ) ); // 2.7182818284590455