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Introduction to C++
course content

Course Content

Introduction to C++

Introduction to C++

1. Basics
Get StartedOutputNew LinesComments
2. Variables
Types of VariablesIdentifiersUser InputStringsSimple MathNot Simple MathIncrement (Prefix and Postfix)ConstantChallenge
3. Conditional Statements
BooleansIf ExpressionMore Logical OperatorsElse ExpressionElse If ExpressionShort FormsChallengeSwitch StatementThe Keyword Default
4. Loops
While LoopDo/While LoopFor LoopBreak/Continue Statements
5. Intro to Arrays
Basic Concept of the ArrayLoops in ArraysManipulations with ArraysChallenge

bookLoops in Arrays

Initialize the array declaring every time the single element can take a lot of your code. To go through the array you can use for loops. Let’s print each element of the array using loops:


              
1234

            
int numbers[5] = {1, 2, 3, 4, 5};
for (int i = 0; i <= 4; i++) {
    cout << numbers[i] << " ";
}
copy

In this code, the for loop goes through each element by its index and print in such a way the whole array.

The last index of the array is 4 since we have 5 elements. Keep in mind that the first element’s index is 0 that’s why the for loop initialized the variable i to 0.

We can also define each element in the loops (for example, by its index):


              
12345

            
int numbers[5];
for (int i = 0; i <= 4; i++) {
    numbers[i] = i;
    cout << numbers[i] << " ";
}
copy
Task
test

Swipe to show code editor

Print each element of the array with its index.

  1. Define the array.
  2. Use for loop to go through array.
  3. In output define the element and index in the gaps.

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Section 5. Chapter 2
toggle bottom row

bookLoops in Arrays

Initialize the array declaring every time the single element can take a lot of your code. To go through the array you can use for loops. Let’s print each element of the array using loops:


              
1234

            
int numbers[5] = {1, 2, 3, 4, 5};
for (int i = 0; i <= 4; i++) {
    cout << numbers[i] << " ";
}
copy

In this code, the for loop goes through each element by its index and print in such a way the whole array.

The last index of the array is 4 since we have 5 elements. Keep in mind that the first element’s index is 0 that’s why the for loop initialized the variable i to 0.

We can also define each element in the loops (for example, by its index):


              
12345

            
int numbers[5];
for (int i = 0; i <= 4; i++) {
    numbers[i] = i;
    cout << numbers[i] << " ";
}
copy
Task
test

Swipe to show code editor

Print each element of the array with its index.

  1. Define the array.
  2. Use for loop to go through array.
  3. In output define the element and index in the gaps.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 5. Chapter 2
toggle bottom row

bookLoops in Arrays

Initialize the array declaring every time the single element can take a lot of your code. To go through the array you can use for loops. Let’s print each element of the array using loops:


              
1234

            
int numbers[5] = {1, 2, 3, 4, 5};
for (int i = 0; i <= 4; i++) {
    cout << numbers[i] << " ";
}
copy

In this code, the for loop goes through each element by its index and print in such a way the whole array.

The last index of the array is 4 since we have 5 elements. Keep in mind that the first element’s index is 0 that’s why the for loop initialized the variable i to 0.

We can also define each element in the loops (for example, by its index):


              
12345

            
int numbers[5];
for (int i = 0; i <= 4; i++) {
    numbers[i] = i;
    cout << numbers[i] << " ";
}
copy
Task
test

Swipe to show code editor

Print each element of the array with its index.

  1. Define the array.
  2. Use for loop to go through array.
  3. In output define the element and index in the gaps.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Initialize the array declaring every time the single element can take a lot of your code. To go through the array you can use for loops. Let’s print each element of the array using loops:


              
1234

            
int numbers[5] = {1, 2, 3, 4, 5};
for (int i = 0; i <= 4; i++) {
    cout << numbers[i] << " ";
}
copy

In this code, the for loop goes through each element by its index and print in such a way the whole array.

The last index of the array is 4 since we have 5 elements. Keep in mind that the first element’s index is 0 that’s why the for loop initialized the variable i to 0.

We can also define each element in the loops (for example, by its index):


              
12345

            
int numbers[5];
for (int i = 0; i <= 4; i++) {
    numbers[i] = i;
    cout << numbers[i] << " ";
}
copy
Task
test

Swipe to show code editor

Print each element of the array with its index.

  1. Define the array.
  2. Use for loop to go through array.
  3. In output define the element and index in the gaps.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 5. Chapter 2
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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