C++ String length() function

C++ String length() function tutorial for beginners and professionals with examples on constructor, if-else, switch, break, continue, comments, arrays, object and class, exception, static, structs, inheritance, aggregation etc.

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C++ String length()

This function is used to find the length of the string in terms of bytes.

This is the actual number of bytes that conform the contents of the string , which is not necessarily equal to the storage capacity.

Syntax

int len = s1.length();

Parameters

This function contains single parameter.

Return Value

This function returns the integer value in terms of bytes.

Here, s1 is a string and strlen function calculates the length of the string s1 and stores its value in len variable.

Example 1

#include<iostream>
using  namespace std;
int main()
{
string s1 = "Welcome to TheDeveloperBlog";
int len = s1.length();
cout<< "length of the string is : " << len;
return 0;
}

Output:

Length of the string is 21

Consider a string s1 and s1 contains value i.e Welcome to TheDeveloperBlog .We calculate the length of the string using strlen function and stores in variable len.

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