Increment when calling javascript function

Question

Hello.

I would like that each time I call the function is incremntado the value of ( i ) and displayed in Alert, do not know what I’m doing wrong.

My code;

function incrementar()
{
var count = 0.
count++;
alert(count);
}

Thank you

Answer 1

You are resetting the counter every time you call the function, because it is opening var count inside. Define count before, as in the example, so that the same variable is available whenever it is called.

var count = 0;
    
function incrementar() {
    count++;
    // use console.log ao invés de alert para ver os resultados 
    // no console do navegador, aperte F12 no Chrome para ver o console.
    console.log(count); 
}

incrementar();
incrementar();
incrementar();
incrementar();

Answer 2

The function will always display the value 1, because the algorithm is setting the value of the variable Count to zero every time the function is executed.

You can solve the problem as follows:

var count = 0;
function incrementar() {
  alert(++count);
}