assigning an array value to a variable

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I came across a problem which I did manage to solve but I honestly do not understand how this works.

var array = [3, 6, 2, 56, 32, 5, 89, 32];
var largest = 0;
//My code
for (var i = 0; i < array.length; i++) {
    if (array[i] > largest) {
        largest = array[i];
    }
}

console.log(largest);

How does my array assign a value to my variable within the if statement?

Why does this version not work?

array[i] = largest;

I'm very new to programming and I believe that understanding fundamental things as small as this can help many beginners become competent programmers.


if(array[i] > largest) {
           largest = array[i];
        }

array[i] is 3 and largest is 0 then if condition passes and

largest = array[i];

assign value right to left now the largest value is 3.

so next cycle array[i] is 6 so next 6 > 3 true , it will again change the largest to 6.

like it will give you largest number.

Javascript Array: Copy Value or Reference, JavaScript Arrays: Value vs Reference. Perhaps you have noticed that if you assign an array to another variable and modify that variable's array elements, the​  To assign a value to a Value type variable, follow these steps: In the Workbench, drag the Variable Operation command into the task. Select the User Variables option. Under "Specify Variable," select the variable from the list of all user variables


I think you are mistaking the assignment statement in programming with the equality statement in mathematics.

Assignment vs Equality

In your code, when you say largest = array[i] you are assigning to the variable 'largest' the value of the element on the ith position of the array. Notice here that the array is not changing any of its values in this assignment.

On the other hand, array[i] = largest would try to assign to the ith position on the array the present value of the variable 'largest'.

Creating and Using Arrays, This part of the code shows that to refer to an array element, either to assign a value to it or to get its value, you append brackets to the array name. The value between the brackets indicates (with a variable or other expression) the index of the element to access. Assign Array Value to Variable in PHP. Ask Question Asked 5 years, 4 months ago. Assign array element to variable in PHP. Related. 3599. Create ArrayList from array.


This code is trying to calculate the largest value in an array of values..

Doing

array[i] = largest;

would modify the input itself which is undesired... you need to find the largest value from the given input.. and not modify the given input location to some largest value.

That is why

largest = array[i] 

is correct.

How to Work With Arrays: Declaring and Initializing, is an array of chars. Like any variable, they cannot be used until it has been initialized by assigning it a value. For an array the assignment of a  To initialize an array variable by using an array literal. Either in the New clause, or when you assign the array value, supply the element values inside braces ( {} ). The following example shows several ways to declare, create, and initialize a variable to contain an array that has elements of type Char. ' The following five lines of code create the same array.


When you assign a value to a variable, the variable has to be on the left of the assignment operator (the equals sign "=").

This way has the variable on the left:

largest = array[i];

It puts the array[i] value into the largest variable, and so it works.

This way is backwards:

array[i] = largest;

It puts the largest value into the array[i] element, and your array ends up with a bunch of zeros in it.

Assigning array values to variable, You were very close. There must not be any whitespace around = in variable declaration. Do: Var1=${myarray[0]}. Like any variable, they cannot be used until it has been initialized by assigning it a value. For an array the assignment of a value to an array must define the size of an array: intArray = new int[10];


I know this is an old thread, but i've this issue today and want to help others developers with proper source of knowledge, comming directly from Kyle Simpson.

You don't know JS

Operator assignment has his own way to work. It calculate the statement of the right "=" to later asign it, to the left. This is very important to know how does it work.

Example:

var array = [3, 6, 2, 56, 32, 5, 89, 32];
var largest = 0;
//My code
for (var i = 0; i < array.length; i++) {
    if (array[i] > largest) {
        largest = array[i];
    }
}

console.log(largest);

Here, largest = array[i];

JS, is calculate the statement of the right and assing to the left

So have fun with the book and play.

Declare and assign an array to a variable, To process collections of data in our apps we need to assign values to memory locations we have previously named using var to declare an array variable. When you assign a value to a variable, the variable has to be on the left of the assignment operator (the equals sign "="). This way has the variable on the left: largest = array[i]; It puts the array [i] value into the largest variable, and so it works. This way is backwards: array[i] = largest;


JavaScript Arrays, JavaScript arrays are used to store multiple values in a single variable. Elements of an Array. You access an array element by referring to the index number. ' assign value to variable Student1 = .Cells(1, 1) ' assign value to first item in array Students(1) = .Cells(1, 1) Finally we look at writing the values: ' Print variable value Debug.Print Student1 ' Print value of first student in array Debug.Print Students(1) As you can see, using variables and arrays is quite similar.


Arrays \ Processing.org, After an array is defined and assigned values, its data can be accessed and used within the code. An array element is accessed with the name of the array variable​  Initializing an Array Declaring an array does not initialize the array in the memory. When the array variable is initialized, you can assign values to the array. Array is a reference type, so you need to use the new keyword to create an instance of the array.


Assigning values to arrays using subindices and literal values, Once an associative array variable has been created or declared, values can be assigned to it. One way of assigning values to associative arrays is by direct  Assign Cell Array to singe variable. Learn more about cell arrays, cell array, for loop, loop, while loop, loops MATLAB and Simulink Student Suite