Math.pow()
ES1+Returns the base to the exponent power.
Syntax
Math.pow(base, exponent)Parameters
base number The base number
exponent number The exponent used to raise the base
Return Value
A number representing the given base taken to the power of the given exponent
Examples
console.log(Math.pow(2, 3));
console.log(Math.pow(4, 0.5));
console.log(2 ** 3); // 대안📌 When to Use
Use Math.pow() for exponential calculations, compound interest, scientific formulas, or when you need more control than the ** operator.
⚠️ Common Mistakes
Not handling negative bases with fractional exponents, which return NaN (e.g., Math.pow(-8, 1/3)).
Confusing order of parameters - Math.pow(base, exponent), not Math.pow(exponent, base).
✅ Best Practices
In modern JavaScript, prefer the ** operator for cleaner code: 2 ** 3 instead of Math.pow(2, 3).
For nth roots, use Math.pow(x, 1/n) or x ** (1/n) for positive numbers only.
⚡ Performance Notes
Math.pow() and the ** operator have equivalent performance. For squaring numbers, x * x is faster than Math.pow(x, 2) or x ** 2.
🌍 Real World Example
Compound Interest Calculator
Calculate investment growth using the compound interest formula with annual compounding.
function calculateCompoundInterest(principal, rate, years, compoundsPerYear = 12) {
// A = P(1 + r/n)^(nt)
const amount = principal * Math.pow(
(1 + rate / compoundsPerYear),
compoundsPerYear * years
);
return {
finalAmount: amount.toFixed(2),
totalInterest: (amount - principal).toFixed(2),
growthMultiplier: (amount / principal).toFixed(3)
};
}
console.log(calculateCompoundInterest(10000, 0.07, 10));
// { finalAmount: '20096.61', totalInterest: '10096.61', growthMultiplier: '2.010' }