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JavaScript The Solution

Bjørn Jakobsen
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Bjørn Jakobsen
Front End Web Development Techdegree Student 7,964 Points

Math.pow

// 4. Create a function that calculates the area of a circle. // The function should accept the radius of the circle as an argument // and return the area of that circle. // The area of a circle is the value of π * radius^2

My solution was

function areaCircle(radius) {
 return Math.PI * radius * radius;
}

In the solution video Dave’s solution was

function areaCircle( radius ) {
  return Math.PI * Math.pow(radius,2);
}

Both solutions works and I can’t figure out what Math.pow does why it’s better to use Dave’s solution. Is it just a way to calculate (radius * radius) without typing it twice or does it have any other advantages as well?

1 Answer

Steven Parker
Steven Parker
216,810 Points

As used here, the function just raises "radius" to the power of 2, which is mathematically equivalent to multiplying it by itself. While Dave's solution implements the formula more literally, yours is perfectly acceptable and will produce the same results.   :+1: