How Can I Iterate Through Characters in a C String?

Looping Through Characters in a String in C

Iterating over the characters of a string is a common task in programming. Here are the different methods to achieve this in C :

Range-Based For Loop (C 11 onwards)

std::string str = ???;
for (char& c : str) {
    // Perform actions on the character 'c'
}

Iterator-Based For Loop

std::string str = ???;
for (std::string::iterator it = str.begin(); it != str.end(); ++it) {
    // Perform actions on the character '*it'
}

Traditional For Loop

std::string str = ???;
for (std::string::size_type i = 0; i < str.size(); ++i) {
    // Perform actions on the character 'str[i]'
}

Null-Terminated Character Array Loop

For C-style null-terminated strings, use:

char* str = ???;
for (char* it = str; *it; ++it) {
    // Perform actions on the character '*it'
}

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