I am new to javascript. I am creating a text adventure. I am trying to write a function to take a given parameter, and use the .toLowerCase and return it as the same variable. I think I have the general idea to do it, but I just can not get it to work. Thanks!
function lowercase(a){
return a.toLowerCase();
}
var alive = 1;
while(alive == 1){
var name = prompt("What is your name?");
lowercase(name);
document.write("Hello " + name + "!\n");
break;
}
You need to assign the result of the function:
name = lowercase(name);
Are you new to programming in general? Because Javascript is similar to most other language in this regard.
lowercase(a) completely and just do this: name = name.toLowerCase().
name = lowercase(name);
Since you are returning the value in your function, you must reinitialize the value of the variable. Javascript as far as I know is not a "pass by reference" language. It has always been a "pass by value". Read more about it here.
What's the difference between passing by reference vs. passing by value?
use name = lowercase(name);
the function returns a result, but you have to assign this result to a variable in order to use it after, or you can simply say
document.write('Hello' + lowercase(name) + 'something');
The value of the name variable isn't being changed at the moment, you need to assign it to the result of the function.
function lowercase(a){
return a.toLowerCase();
}
var alive = 1;
while(alive == 1){
var name = prompt("What is your name?");
name = lowercase(name);
document.write("Hello " + name + "!\n");
break;
}
name = lowercase(name);
Note, you should almost always use "===" instead of "==". "===" tests whether something's value and data type (number, string, boolean, object, etc.) matches another, whereas "==" only tests whether the values match (after performing a type conversion). For example:
if ("42" == 42) { // true (string 42 equals number 42)
if ("42" === 42) { // false (string does not equal number, what you want)
whileloop and then breaking out of it straight away?