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";
}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 (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
// Create an array of integers int myNumbers[5] = {10, 20, 30, 40, 50}; // Loop through integers
for (int num : myNumbers) {
cout << num << "\n";
}Example
// Create an array of strings string cars[5] = {"Volvo", "BMW", "Ford", "Mazda", "Tesla"}; // Loop through strings
for (string
car : cars) {
cout << car << "\n";
}