How to Concatenate Multiple C++ Strings on One Line? Last Updated : 21 Apr, 2025 Comments Improve Suggest changes Like Article Like Report In C++, strings are used to store a sequence of characters. The combination of multiple strings into a single one is called Concatenation. In this article, we will learn how to concatenate multiple strings in C++. Example Input: str1="Hello!"str2="Geek"str3="Welcome to GfG"Output:Hello! Geek Welcome to GfGConcatenate Multiple C++ Strings in One LineIn the std::string class, the '+' operator is overloaded to concatenate two strings. We can use this '+' operator of the std::string to concatenate multiple strings into a single line. C++ Program to Concatenate Multiple Strings in One Line C++ // C++ program to concatenate mutiple strings #include <iostream> #include <string> using namespace std; int main() { // Initialize sttings string s1 = "Hello!"; string s2 = " Geek"; string s3 = " Welcome to GfG"; // concatenate string using + operator string ans = s1 + s2 + s3; // printing concatenated string cout << "The Concatenated string is : " << ans << endl; return 0; } OutputThe Concatenated string is : Hello! Geek Welcome to GfG Time Complexity: O(N), where N is the total length of all the strings being concatenated.Auxiliary Space: O(N) We can also use strcat() and append() function to concatenate multiple strings. Comment More infoAdvertise with us Next Article How to Concatenate Multiple C++ Strings on One Line? H harshsingh123 Follow Improve Article Tags : C++ Programs C++ cpp-string CPP Examples Practice Tags : CPP Similar Reads How to Concatenate Multiple Strings in C++? 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