I start in the programming and I come to your help.
I made a while loop which responds correctly when I add a condition, however when I add a 2nd condition the loop goes into an infinite cycle even though the conditions are true and must come out of the loop. loop.
I share my code and I am grateful with your quick answers:
var operacion= prompt("Ingresu su operación");
while(operacion!="sumar" || operacion!="restar"){
operacion= prompt("Esta operación no está contemplada");
}
The problem is the type of condition you are using. || or also known as OR check if one of the two conditions is true or not.
So if we analyze what your code does:
while (operacion != "sumar" || operacion != "restar")
operacion that you received as text from the prompt is different from either "subtract" or "add". operacion != "sumar" - > it is fulfilled, it no longer reviews the other condition, so it continues within the cycle. operacion != "sumar" is not met, check the following condition, operacion != "restar" , it is fulfilled so it continues within the cycle. As you can see both conditions will never be fulfilled, because that is part of the condition || or one or the other but not both. If I understand what you want to do you must change your condition to a AND also known as &&
var operacion= prompt("Ingresu su operación");
while(operacion!="sumar" && operacion != "restar"){
operacion= prompt("Esta operación no está contemplada");
}This loop will always be true because you are saying that "operation" is different from "add" or different from "subtract", you have to change the OR "||" for an AND "& amp;"