Thursday, December 9, 2021
JavaScript is a flexible language, and that flexibility extends to functions. A JavaScript function are not just codes that you reuse and execute. There are also values, values that you assign to a variable. In the following example we are going to write a function that will calculate the radius of a circle. But instead of invoking radius function like a normal function call, we are going to assign to a function to a variable first.
The code above returns a value of the radius by dividing the circumference by 2*Math.PI and outputting the result to the console log. Notice once we assign the function to the radius to variable r, we can use the variable r in place of the function radius.
Here is the result:
The following is the formula for a radius according to Google
Here is the code to calculate the radius of a circle in JavaScript
<script>
var r = radius;
function radius(circumference) {
return circumference / (2 * Math.PI);
}
console.log(r(10));
</script>
The code above returns a value of the radius by dividing the circumference by 2*Math.PI and outputting the result to the console log. Notice once we assign the function to the radius to variable r, we can use the variable r in place of the function radius.
Here is the result:
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