Variable conditional not declaring as expected

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I'm prob missing something simple but I don't understand why this returns "undefined" in each console.log when I'm declaring the variable immediately before the console.log

            var timer;
            var timerCalc = Math.random()*2000;

            if (timerCalc > 1000){
                timer === 1000;
                console.log(timer);
            } else if  (timerCalc < 100) {
                timer === 100;
                console.log(timer);
            } else {
                timer === timerCalc;
                console.log(timer + " = between 100 and 1000");
            }

You're doing === (comparison) instead of = (assignment). Use the latter.

Conditional (ternary) operator, The conditional (ternary) operator is the only JavaScript operator that expected output: "$2.00". 7. ​ exprIfTrue: An expression which is evaluated if the condition evaluates to a truthy value (one which equals or can be converted to true ). variable "x" · ReferenceError: can't access lexical declaration`X'  Conditional expectation in general. The general formula for computing the conditional expectation of given does not require that the two variables form a discrete or a continuous random vector, but it is applicable to any random vector.

=== is for checking equivalency, use a single = to assign the variable.

So for example:

timer = 1000;
console.log(timer);  //will print out 1000

ifelse, The if statement executes a statement if a specified condition is truthy. If the condition is expected output: "NOT positive". 13. ​. Run › Reset. A symbol that you define with -define or with #define doesn't conflict with a variable of the same name. That is, a variable name should not be passed to a preprocessor directive, and a symbol can only be evaluated by a preprocessor directive. The scope of a symbol created with #define is the file in which it was defined.

var timer;

your variable is created but no value is associated it gonna be undefined

timer === 1000;

this condition is undefined === 1000 wich is false

console.log(timer);

no value is assinged to timer so it's gonna show undefined

Actually if you replace === (strict comparison) with = (assign) in your code the console.log will show 1000 in the first log and 100 in the second

Understanding Common Errors In Java, expected. public class Driver{ public static void main (String[] args){ elements of Java like loops and conditionals are not considered statements. You are trying to access a variable or class which does not exist or can not be accessed. Ensure that if you declared a method that returns something other  The keyword for declaring the variable has ‘var’ at the end and it is true for all variable types. You can also assign an initial value to a variable with declaration or in separate syntax. Local NumberVar Z; //Declare Z to be a Number variable Z := 30; //Assign the value of 30 to Z To use Variables in formulas, its scope is defined.

You are checking on equality not assigning value

Chapter 7. JavaScript's Syntax, Two slashes start single-linecomments var x ; // declaring a variable x = 3 + y The reverse does not hold: you cannot write a statement where JavaScript expects an expression. There is a similar kind of expression, the conditional operator. You can specify conditions under which a step, job, or stage will run. Only when all previous dependencies have succeeded. This is the default if there is not a condition set in the YAML. Even if a previous dependency has failed, unless the run was canceled. Use succeededOrFailed() in the YAML for this condition.

IOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa , Swift, however, does not permit you to use bare curly braces to do this. selectedTile, with:tile, check:true, fence:true) } Conditional binding In Swift, if can be followed immediately by a variable declaration and assignment — that is, by let or The assigned value is expected to be an Optional — the compiler will stop you if it  Variables in SQL procedures are defined by using the DECLARE statement. Values can be assigned to variables using the SET statement or the SELECT INTO statement or as a default value when the variable is declared. Literals, expressions, the result of a query, and special register values can be assigned to variables.

AL Simple Statements, Assignment statements assign a value to a variable. If you do not handle the return value in your code, then a run-time error occurs when a The AssertError keyword specifies that an error is expected at run time in the  When declaring variables with var and let, we can optionally initialize the variables at the point of declaration: var a = 2; var b = 3; Declaring variables with the var keyword. When you declare a variable using the var keyword, the scope is as follows: If the variable is declared outside of any functions, the variable is available in the

Conditionals and logic | Think Java, For example, true || anything is always true, so Java does not need to Good indentation is essential to make the structure (or intended structure) The first line is a variable declaration, the second is an assignment, and the third is both. But the VBA conditional compilation function does not operate this way. It evaluates any value not equal to 0 as True and any value not equal to -1 as False. What this means is that any value other than 0 or -1 is going to result in a positive outcome whether or not the “Not” operator is used.

Comments
  • Because === doesn't assign value, but it checks equality.
  • thanks that was simple and obvious!