Javascript explanation

Question

About Input and Output in Javascript, can someone help me out by explaining this two better.

Answer 1

One way to enter data:
"Prompt Box".
One way to output data:
"Alert Box".
https://www.sololearn.com/learn/JavaScript/1149/
Second way to output data:
"document.write()".
https://www.sololearn.com/learn/JavaScript/1124/
For an example on the topic of input, data output, my previously written code to solve a problem from SoloLearn
https://code.sololearn.com/WItLP7g7P15O/?ref=app
P.S: "Do not forget to read the comments under each lesson, there you can find out a lot of useful information on the topic covered".