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C++ Access Strings


Access Strings

You can access the characters in a string by referring to its index number inside square brackets [].

This example prints the first character in myString:

Example

string myString = "Hello";
cout << myString[0];
// Outputs H
Try it Yourself »

Note: String indexes start with 0: [0] is the first character. [1] is the second character, etc.

This example prints the second character in myString:

Example

string myString = "Hello";
cout << myString[1];
// Outputs e
Try it Yourself »

To print the last character of a string, you can use the following code:

Example

string myString = "Hello";
cout << myString[myString.length() - 1];
// Outputs o
Try it Yourself »

Change String Characters

To change the value of a specific character in a string, refer to the index number, and use single quotes:

Example

string myString = "Hello";
myString[0] = 'J';
cout << myString;
// Outputs Jello instead of Hello
Try it Yourself »

The at() function

The <string> library also has an at() function that can be used to access characters in a string:

Example

string myString = "Hello";
cout << myString; // Outputs Hello

cout << myString.at(0);  // First character
cout << myString.at(1);  // Second character
cout << myString.at(myString.length() - 1);  // Last character

myString.at(0) = 'J';
cout << myString;  // Outputs Jello
Try it Yourself »

Tip: A list of other useful string functions, can be found in our String Functions Reference.


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