DevAcademia lesson/C++ Basics

String Concatenation

Topic progressTopic 26 of 109 - 24% complete

~8 min lesson15 learning blocks4 code examples1 checks/interactions

Lesson outline

Combining Strings

Concatenation means joining strings together. In C++, you can concatenate strings using the + operator.

You can also append to strings using the += operator or the append() method.

You can concatenate std::string objects with other std::string objects.
You can concatenate std::string objects with C-style strings (string literals or const char*).
You can concatenate std::string objects with single characters (e.g., '!').
You cannot use + between two string literals (both operands are const char*), but adjacent string literals without + are concatenated at compile time.

Each operator+ creates a new string. Prefer +=/append() in loops and consider reserving capacity to reduce reallocations.

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