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C++ Arrays and Loops

Loop Through an Array

You can loop through the array elements with the loop.

The following example outputs all elements in the cars array:

Example

string cars[5] = {"Volvo", "BMW", "Ford", "Mazda", "Tesla"};
for (int i = 0; i < 5; i++) {
  cout << cars[i] << "n";
}

This example outputs the index of each element together with its value:

Example

string cars[5] = {"Volvo", "BMW", "Ford", "Mazda", "Tesla"};
for (int i = 0; i < 5; i++) {
  cout << i << " = " << cars[i] << "n";
}

And this example shows how to loop through an array of integers:

Example

int myNumbers[5] = {10, 20, 30, 40, 50};
for (int i = 0; i < 5; i++) {
  cout << myNumbers[i] << "n";
}

The foreach Loop

There is also a "for-each loop" (introduced in C++ version 11 (2011), which is used exclusively to loop through elements in an array:

Syntax

for (type variableName : arrayName) {
  // code block to be executed
}

The following example outputs all elements in an array, using a "for-each loop":

Example

int myNumbers[5] = {10, 20, 30, 40, 50};
for (int i : myNumbers) {
  cout << i << "n";
}

Arrays and Loops
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