Repeating the If Statement?

Question

Okay, so I don't know how to really word this, so I'm gonna provide a snippet of code, and possibly if you need me to explain more than I do, then I will without issue.

Say you have a code that's like {I'm gonna use JS because That's the language I am trying to use it in}

say we ask for a users age,

if(age < 13)
{
window.alert("Younger than 13")
}

else if (13 < age)
{
window.alert("Older than 13")
}
else if (13 == 13)
{
window.alert("You're 13")
}
else
{
//instead of doing the same thing over and over again,
//in this line, is there a way to just redo the check?
}

Answer 1

Ok, I created a finalized version of your snippet of code:

var age = prompt("How old are you?");
if (age < 13) {
alert("Younger than 13");
}
else if (age > 13) {
alert("Older than 13");
}
else if (age == 13) {
alert("Is 13");
}
else {
statement()
}
function statement() {
var age = prompt("I'm sorry, I didn't understand that statement. Please restate your answer. How old are you?");
if (age < 13) {
alert("Younger than 13");
}
else if (age > 13) {
alert("Older than 13");
}
else if (age == 13) {
alert("Is 13");
}
else {
statement()
}
}

As you can see, if the user types in anything but a number, it will call in the function "statement" and then repeat the age prompt. It will force the person to respond with an actual number in order to advance within the page.

Im attempting to make it more compact right now by adding more functions and less commands, but for now this should work.

Answer 2

@Eranga Like instead of in the else statement, instead of doing :

if(age < 13)
{
window.alert("Younger than 13")
}

else if (13 < age)
{
window.alert("Older than 13")
}
else if (13 == 13)
{
window.alert("You're 13")
}
else
{
//instead of doing the same thing over and over again,
//in this line, is there a way to just redo the check?
}

Over and over again, I was wondering if there's just a way to avoid that to save lines of code

Answer 3

@iBrandon I am talking in general, but in this case, I'm trying to get it so it would be like
What if they enter a word like "aguih" instead of a age?

Answer 4

@iBrandon please do, I apologize if I am asking for too much :)

Answer 5

@iBrandon so make it in a function?

Answer 6

@Eranga is that JS only thing though ?

Answer 7

@iBrandon so the If Statement would be in a function ?
Sorry, I have a mild form of autism

Answer 8

@iBrandon if thats what I would want, that would mean put the if statements in a function ?

Answer 9

Thank you (:

Answer 10

That works, thanks :D

Answer 11

@Eranga I don't fully understand what that is, I just watched a video on it

Answer 12

@Eranga I may have multiple "ifs" and variables, so I don't know :/

Answer 13

@iBrandon but would it loop the asking?

Answer 14

@iBrandon but the thing about that, is right after that, it's just gonna end the program

Answer 15

So, like @Eranga said, you could do a while statement to re-check the statement until another instance occurs.

Answer 16

What script are you attempting to create?

Answer 17

Ohh! I actually created a script on a topic sort of like this earlier! I'll show you an example of one of my previous scripts:

Answer 18

This is similar to what you are attempting to make:

var name = prompt("What is your name?");
var response = prompt("Nice to meet you, " + name + ". Are you feeling good or bad today?");

if (response == "good") {
document.write("You're doing well " + name + ", that's great to know! Goodbye!");
}
else if (response == "bad") {
document.write("I see, " + name + ". ");
var scale = prompt("Aw, that's too bad! On a scale of 1 through 10, how bad do you think youre feeling?");
if (scale == "1") {
document.write(" Only 1? That shouldn't be that bad!")
}
else if (scale == "2") {
document.write(" Hey, 2 isn't the worst! Cheer up!");
}
else if (scale == "3") {
document.write(" Hey, at least it isn't 4!");
}
else if (scale == "4") {
document.write(" 4? Cheer up!");
}
else if (scale == "5") {
document.write(" 5? Meh.");
}
else if (scale == "6") {
document.write(" Well, at least it isn't 7!");
}
else if (scale == "7") {
document.write(" Hey! 7 is my favorite number!");
}
else if (scale == "8") {
document.write(" 8 is less than 9, right? Cheer up!");
}
else if (scale == "9") {
document.write(" Hey, at least 9 isn't a double digit!");
}
else if (scale == "10") {
document.write(" Well arent you negative! Go find something to cheer yourself up!");
}
else {
document.write(" Hey, I said 1-10! My processor isn't intelligent enough for those types of numbers!");
}
}
else {
document.write("You're doing " + response + "? I'm sorry, but I don't understand that statement.");
}

Answer 19

As you can see, I added an else statement at the end so that if their answer is not "good" or "bad", it will give them a different response.

Answer 20

Well, you would have to add more script to the end such as a function if you wanted it to continue. For mine it just gives a response and then ends the script.