How to Check if String is Empty in C++ - Step by Step Examples

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How to Check if String is Empty in C++ ?

Answer

To check if a string is empty in C++, you can use the empty() method of the string class.

✐ Examples

1 Check if String is Empty using empty() method

In this example,

We include the header file to use the string class.
We declare a string variable named str1 with an empty string value "".
We use the empty() method on str1 to check if it is empty.
The empty() method returns true if the string is empty, otherwise false.
Finally, we print the result to the console.

C++ Program

#include <iostream>
#include <string>

int main() {
    std::string str1 = "";
    bool isEmpty = str1.empty();
    std::cout << "Is string empty: " << isEmpty;
    return 0;
}

Output

Is string empty: 1

2 Check if String is Empty using empty() method with non-empty string

In this example,

We include the header file to use the string class.
We declare a string variable named str2 with a non-empty string value "Hello World".
We use the empty() method on str2 to check if it is empty.
The empty() method returns true if the string is empty, otherwise false.
Finally, we print the result to the console.

C++ Program

#include <iostream>
#include <string>

int main() {
    std::string str2 = "Hello World";
    bool isEmpty = str2.empty();
    std::cout << "Is string empty: " << isEmpty;
    return 0;
}

Output

Is string empty: 0

Summary

In this tutorial, we learned How to Check if String is Empty in C++ language with well detailed examples.

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How to Check if String is Empty in C++ - Step by Step Examples

How to Check if String is Empty in C++ ?

Answer

✐ Examples

1 Check if String is Empty using empty() method

C++ Program

Output

2 Check if String is Empty using empty() method with non-empty string

C++ Program

Output

Summary

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