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The Math.sqrt() static method returns the square root of a number. That is
function calcHypotenuse(a, b) {
return Math.sqrt(a * a + b * b);
}
console.log(calcHypotenuse(3, 4));
// Expected output: 5
console.log(calcHypotenuse(5, 12));
// Expected output: 13
console.log(calcHypotenuse(0, 0));
// Expected output: 0
x
A number greater than or equal to 0.
The square root of x, a nonnegative number. If x < 0, returns NaN.
Because sqrt() is a static method of Math, you always use it as Math.sqrt(), rather than as a method of a Math object you created (Math is not a constructor).
Math.sqrt(-1); // NaN
Math.sqrt(-0); // -0
Math.sqrt(0); // 0
Math.sqrt(1); // 1
Math.sqrt(2); // 1.414213562373095
Math.sqrt(9); // 3
Math.sqrt(Infinity); // Infinity
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