How to use FOR-generated number in the name of a variable?

Question

How to use FOR generated number in a variable name ?

Example:

for (var i = 0; i < 5; i++) { 
var teste[i] = "teste é " +[i];
}

Example 2:

for (var b = 0; b < 5; b++) { 
var teste[b] = "teste";
}

OR

I have to create a group of numbered variables, example:

var teste1
var teste2
var teste3...

What better way than one by one ?

Answer 1

Although it is possible, avoid creating variables with dynamic names!

In these examples, you can very well use arrays, where each value can be obtained by the index.

When you say [i], is creating an array with the i in. If I understand the question correctly, you simply want the value i:

var teste = [];
for (var i = 0; i < 5; i++) { 
    teste[i] = "teste é " + i;
}

Notice that I also amended your statement var teste[i], which is a syntax error. Declare the array outside the loop, and within only assign each position. Another alternative is to use push:

var teste = [];
for (var i = 0; i < 5; i++) { 
    teste.push("teste é " + i);
}

Answer 2

To bfavaretto response is the most recommended, but in case you need include the numeric index in the variable name for some reason, you can use any object (including the global object window) and dynamically assign it new properties:

for (var i = 0; i < 5; i++) { 
    window["teste" + i] = "teste é " + i;
}
alert(teste3); // "teste é 3"

var testes = {};
for (var b = 0; b < 5; b++) { 
    testes["teste" + b] = "teste";
}
alert(testes.teste3); // "teste"

(where the window, it becomes a global; in the other case, you need to prefix it with the created object; there is no way to create a local variable that way)

Note that this is not a good practice, among other things because you cannot iterate over your easily created variables (as it would be if you used an array). I’m just responding literally to what was asked.