Checking if a string is empty in C++
In this post we will give you information about Checking if a string is empty in C++. Hear we will give you detail about Checking if a string is empty in C++And how to use it also give you demo for it if it is necessary.
we are going to learn about how to check if a string is empty or not in C++.
Checking string is empty
To check if a string is empty or not, we can use the built-in empty() function in C++.
The empty() function returns 1 if string is empty or it returns 0 if string is not empty.
Here is an example:
#include <iostream>#include <string.h>using namespace std;int main(){ string user = ""; if(user.empty()){ cout << "user string is empty"; }else{ cout << "user string is not empty "; } return 0;}
Output:
"user string is empty"
Similarly, we can also use the length() function to check if a given string is empty or not.
#include <iostream>#include <string.h>using namespace std;int main(){ string user = ""; if(user.length() === 0){ cout << "user string is empty"; }else{ cout << "user string is not empty "; } return 0;}
or we can use the size() function.
#include <iostream>#include <string.h>using namespace std;int main(){ string user = ""; if(user.size() === 0){ cout << "user string is empty"; }else{ cout << "user string is not empty "; } return 0;}
Note: The length() or size() functions returns the total number of characters in a given string.
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