C++ Arrays and Loops
Loop Through an Array
You can loop through the array elements with the for
loop.
The following example outputs all elements in the cars array:
Example
// Create an array of strings
string cars[5] = {"Volvo", "BMW", "Ford", "Mazda",
"Tesla"};
// Loop through strings
for (int i = 0; i < 5;
i++) {
cout << cars[i] << "\n";
}
Try it Yourself »
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";
}
Try it Yourself »
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";
}
Try it Yourself »
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 (and other data structures, like vectors and lists):
Syntax
for (type variableName : arrayName) {
// code block to be executed
}
The following examples output all elements in an array using a "for-each loop":
Example
Loop through integers:
// Create an array of integers
int myNumbers[5] = {10, 20, 30, 40, 50};
// Loop through integers
for (int i : myNumbers) {
cout << i << "\n";
}
Try it Yourself »
Example
Loop through strings:
// Create an array of strings
string cars[5] = {"Volvo", "BMW", "Ford", "Mazda", "Tesla"};
// Loop through strings
for (string
car : cars) {
cout << car << "\n";
}
Try it Yourself »
