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Returns the length of a string.

static size_t length( 
   const char_type* _Str 


The C-string whose length is to be measured.

The number of elements in the sequence being measured, not including the null terminator.

// char_traits_length.cpp
// compile with: /EHsc
#include <string>
#include <iostream>

int main( ) 
   using namespace std;
   const char* str1= "Hello";
   cout << "The C-string str1 is: " << str1 << endl;
   size_t lenStr1;
   lenStr1 = char_traits<char>::length ( str1 );
   cout << "The length of C-string str1 is: " 
        << lenStr1 << "." << endl;
The C-string str1 is: Hello
The length of C-string str1 is: 5.

Header: <string>

Namespace: std

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