How To Change Value In Array C++

How to Access and Modify Elements of an Array in C++

C++

In this commodity, we show how to access and modify elements of an assortment in C++.

We showed previously how to create an array in C++, in which we went over how to declare and initialize an array.

At present nosotros will show how to access the elements then that you tin output the elements. We will likewise show how yous can modify any of the elements of the assortment, and then that y'all tin can alter some of all of their values.

How to Access Elements of an Array

We now evidence to access chemical element of an array in C++.

So we volition create a basic assortment that has 5 elements.

We will then show how to access the elements of the array.

This is shown in the code below.

So we'll at present go over the code higher up.

And so we create an array, named test_scores, which has five elements.

We are able to access each of the elements by specifying the proper name of the array followed past the alphabetize number of each chemical element of the assortment.

Being that we created an array of 5 elements, it has 5 elements.

The get-go chemical element of an array starts at an index location of 0.

So this array with v elements has elements with an alphabetize location of 0 to 4.

test_scores[0] allows us to access the first element.

test_scores[1] allows us to access the second chemical element.

test_scores[2] allows usa to access the 3rd chemical element.

test_scores[3] allows us to admission the quaternary element.

test_scores[iv] allows the states to access the 5th chemical element.

So this is one way to access each individual element of an array.

If y'all want to iterate through all elements of an array in C++, you tin can utilise a for loop.

So hither we have a for loop and iterates through each element of the array.

This is way nosotros tin can admission every chemical element of an assortment.

This is especially good for large arrays.

In the example above, this gives usa the following output shown beneath.

How to Modify an Element of an Array

Then now we become over how to modify an element of an array in C++.

So we create a basic array then we modify values within this array.

In lodge to modify a value of an assortment, you reference the array element by the array name and alphabetize location and and so employ the equals operator to set the value to what you want it to change to.

We alter both elements of the in a higher place ii-item array.

The line, test_scores[0]= 82;, changes the offset element to 82. Previously, the value was 75.

The line, test_scores[1]= 94;, changes the second element to 94. Previously, the value was 88.

When we run the program, we become the following ouput shown beneath.

And so you tin see that we successfully modified the values of the elements in the array.

And this is how to access and modify elements of an array in C++.

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