$1.$ Write a complete JavaScript program to prompt the user for the radius of a sphere, and call

function sphereVolume to calculate and display the volume of the sphere. Use the statement

volume $=(4\mathrm{.}0/3\mathrm{.}0)*$ Math.PI $*$ Math.pow$($ radius, $3)$;

to calculate the volume. The user should enter the radius in an HTML$5$ input element of type

"number" in a form. Give the input element the id value "inputField". You can use this id with

the document object$$s getElementById method to get the element for use in the script. To access the

string in the inputField, use its value property as in inputField.value, then convert the string to

a number using parseFloat. Use an input element of type "button" in the form to allow the user

to initiate the calculation. $[$Note: In HTML$5$ input elements of type "number" have a property

named valueAsNumber, that enables a script to get the floating$-$point number in the input element

without having to convert it from a string to a number using parseFloat. At the time of this writing,

valueAsNumber was not supported in all browsers.

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Embedded JS code in HTML with execution screenshots