I need to know how to achieve what’s in the picture. A situation where which when the user clicks on the plus or minus sign or updates the text area.

The amount is incremented 50 times the number in the text area.

Please it’s urgent

your explanation isn't clear enough, if the number is multiplied by 50 when u press the + sign. What happens to the number when u press the - sign?

When you press the minus sign whatever number there should still be multiplied by 50. To give the total amount.

Each unit costs 50 Naira.

So whichever amount of units that are in the input text box should be multiplied by 50 and displayed there.

Add a click event listener to the button and update the value of the text area withh it's current value * 50.

Please can you give me the exact code for that. Thank you

Let me try.

On the button add click event to it:

onclick="addFifty()"

On the amount HTML tag, add an id of "add":

id="add".

On your script tag, write this:

<Script>
Var add = document.getElementById("add" ) .value;

function addFifty (){

Var result = add + 50;

document.getElementById("add" ) .value = result;

}

This should work.


</Script>