Write inside input using JS

Question

Can someone explain how to write inside an html input using javascript function onclick
Ex
<input type=text id=number>
<input onclick="calculate()" type= "submit">
Now i want to write something inside the input form with id number if someone clicks on submit.
What should the function calculate be then?

Answer 1

//Here by getting input field by id and changing input field value.
function calculate(){
document.getElementById('number').value='hello'
}
https://code.sololearn.com/W0aZOm4Cj1fq/?ref=app