Undefined variable
Oh, hi there little one! So, have you ever played a game where you have to find something, but you don't know what it is? That's a bit like what an undefined variable is in computer programming.
You see, when people write instructions for computers to follow, they sometimes use words, called variables, to stand for things they want the computer to remember. For example, if we want the computer to remember how old someone is, we might say their age is a variable.
But if we use a variable that the computer doesn't know about or hasn't been told yet, that's when we get an "undefined variable" error. It's like trying to find something that hasn't been named or explained yet.
It's a bit like if you were playing a game with your friends and one of them said, "Bring me the shiny thing," but they never told you what the shiny thing was. You'd be confused and wouldn't know what to do. This is what happens to the computer when it comes across an undefined variable.
To fix this error, we need to make sure that we give the computer all the information it needs to understand what the variables mean. Just like how your friend needs to tell you what the shiny thing is before you can give it to them.
Does that make sense, little one?
You see, when people write instructions for computers to follow, they sometimes use words, called variables, to stand for things they want the computer to remember. For example, if we want the computer to remember how old someone is, we might say their age is a variable.
But if we use a variable that the computer doesn't know about or hasn't been told yet, that's when we get an "undefined variable" error. It's like trying to find something that hasn't been named or explained yet.
It's a bit like if you were playing a game with your friends and one of them said, "Bring me the shiny thing," but they never told you what the shiny thing was. You'd be confused and wouldn't know what to do. This is what happens to the computer when it comes across an undefined variable.
To fix this error, we need to make sure that we give the computer all the information it needs to understand what the variables mean. Just like how your friend needs to tell you what the shiny thing is before you can give it to them.
Does that make sense, little one?