C++ Program to Find length of String

In this tutorial you will learn about the C++ Program to Find length of String and its application with practical example.

In this tutorial, we will learn to create a C++ program that will Find the length of String in C++ programming.

Table Of Contents−

C++ Program to Find Length of String

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.

Basic Input and Output function in C++ Programming.
Basic C++ programming.
Using Strings in C++ Programming.

Algorithm:-

1. Declaring the variables for the program.

2. Taking input strings from the user. 

3. Concatinating the string from the taken variable.

4. Printing the result string.

5. End

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						1. Declaring the variables for the program.
 
2. Taking input strings from the user. 
 
3. Concatinating the string from the taken variable.
 
4. Printing the result string.
 
5. End

Program to Find the length of String

In this program, we will take the input as a string from the user and then we will find the length of the input string. Using the predefined string function from the c++ libraries.

With the help of this below program, we can find the length of the String.

Program Code:-

#include <iostream>  
using namespace std;  
int main ()  
{  
    //declaring the variables for the program
    string str1, str2, result; // declaring the string variables  
    int i;  //declaring the integer variables
    
    //taking input string1 from the user 
    cout <<"  Enter the first string: ";  
    cin >> str1; // take string1
    //taking input string2 from the user
    cout << "  Enter the second string: ";  
    cin >> str2; // take second string   
    // use for loop to enter the characters of the str1 into result string   
    for ( i = 0; i < str1.size(); i++)  
    {  
    result = result + str1[i]; // add character of the str1 into result   
    }   
    // use for loop to enter the characters of the str2 into result string   
    for ( i = 0; i < str2.size(); i++)  
    {  
    result = result + str2[i]; // add character of the str2 into result   
    }  
    cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;  
    
    //printing the size of the string 
    cout<< endl;
    cout <<"String Length = " << result.size();
    return 0;  
}

#include <iostream>

using namespace std;

int main ()

{

//declaring the variables for the program

string str1, str2, result; // declaring the string variables

int i; //declaring the integer variables

//taking input string1 from the user

cout <<" Enter the first string: ";

cin >> str1; // take string1

//taking input string2 from the user

cout << " Enter the second string: ";

cin >> str2; // take second string

// use for loop to enter the characters of the str1 into result string

for ( i = 0; i < str1.size(); i++)

{

result = result + str1[i]; // add character of the str1 into result

}

// use for loop to enter the characters of the str2 into result string

for ( i = 0; i < str2.size(); i++)

{

result = result + str2[i]; // add character of the str2 into result

}

cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;

//printing the size of the string

cout<< endl;

cout <<"String Length = " << result.size();

return 0;

}

Output:-

In the above program, we have first initialized the required variable.

str1 = it will hold the string value.
str2 = it will hold the string value.
result = it will hold the string value.

i = it will hold the integer value.

Taking Input string from the user for copying the string.

Printing the output size of the string.

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C++ Program to Find length of String