🎓 can u explain this function ....>>>

Question

function using in calculator ......

function displayValue (num) {
document.calc.display.value = document.calc.display.value + num
}

Answer 1

inside the document (body ).

there is. a form named as calc;

inside the form there is a textbox (any input element) which has a name display

we are access the value by

document.calc.display.value

and we add num on it

Answer 2

The function just increases the value of the display of the calc object by num. num is just a variable accepted in the parameters of the function.

Using += might improve read-ability for long lines such as this one.