Javascript, How to show two value into same input type text field? -

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i want show 10 20 in single input type text, below option not working. can 1 me

javascript:-

var = 10; var b = 20;  document.getelementbyid("current").value = , b;

html:-

<input type="text" id="current">

you can this:

document.getelementbyid("current").value = + " " + b;

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