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PHP - variable scope inside if statement and while loop


PHP - variable scope inside if statement and while loop

By : Yavuz Selim Özmen
Date : November 27 2020, 01:01 AM
To fix this issue Basically yes, any variables defined inside an if or while will be available in the scope that the if or while exists in (as they are defined in a conditional though they might not have been set so you would receive an undefined warning)
so
code :


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How do I use this variable in if statement in a loop (scope)

How do I use this variable in if statement in a loop (scope)


By : biohazard7720
Date : March 29 2020, 07:55 AM
like below fixes the issue i is a global variable, meaning that it's initialised to 0 (explicitly) when your program starts, and then can be changed by any code that can see it.
So, if your question is:
code :
void loop (void) {
    static int persistentVar = 0;
    :
    :
}
Variable scope inside while loop

Variable scope inside while loop


By : ham
Date : March 29 2020, 07:55 AM
I wish did fix the issue. This is perhaps one of the most odd things I've ever encountered. I don't program much in C but from what I know to be true plus checking with different sources online, variables macroName and macroBody are only defined in scope of the while loop. So every time the loop runs, I'm expecting marcoName and macroBody to get new addresses and be completely new variables. However that is not true. , These arrays are allocated on the stack:
code :
char macroName[MAXLINE];
char macroBody[MAXLINE];
Scope of variable inside for loop

Scope of variable inside for loop


By : Patel Hitesh
Date : March 29 2020, 07:55 AM
I wish did fix the issue. If you initialize it inside the loop, then the initialization happens on each iteration. I would use the word "reinitialize" in fact. I mean, it's just basic control flow — you initialize an accumulator variable before the loop begins, and then you modify it on each iteration of the loop.
Scope of variable inside do-while loop

Scope of variable inside do-while loop


By : W.Tan
Date : March 29 2020, 07:55 AM
I hope this helps you . I'm trying to loop through an entire program if the user inputs "y" or "Y" when they are prompted at the end of the program, but I'm getting a "cannot find symbol - variable response" error since the variable I declared is inside the do-while loop, therefore I suppose I can't use it in the condition of the do-while loop. Is there any way to get around this problem and still be able to loop through the program if the user inputs a "y" or "Y"? This is all in the main method and getFileRunStats is the method that contains all other methods from the program. , You can just remove the statement, and add it to the loop condition.
code :
do {
} while (keyboard.nextLine().equalsIgnoreCase("y"));
Javascript for loop and if statement counter variable scope

Javascript for loop and if statement counter variable scope


By : Mario Uneprochainefo
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further
JavaScript has two scopes – global and local. Any variable declared outside of a function belongs to the global scope, and is therefore accessible from anywhere in your code. Each function has its own scope, and any variable declared within that function is only accessible from that function and any nested functions. Because local scope in JavaScript is created by functions, it’s also called function scope. When we put a function inside another function, then we create nested scope.
code :
data=[
{
"closed":true
},{
"closed":false
}]

function analyse(data) {
    var counter = 0;
    for (let i = 0; i < data.length; i++) {
        if (data[i].closed == true) {
            counter++;
        }
    }
    var totalOpen = data.length - counter;
    var totalClosed = counter;
    console.log(totalClosed);
    return totalClosed;
}
console.log(analyse(data))
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