EDUCBA

EDUCBA

MENUMENU
  • Free Tutorials
  • Free Courses
  • Certification Courses
  • 600+ Courses All in One Bundle
  • Login

C++ Int to String

Home » Software Development » Software Development Tutorials » C ++ Programming Tutorial » C++ Int to String

C++ Int to String

Introduction to C++ Int to String

When you write programs for your software there are multiple instances where you might need to convert a given number from integer to string and maybe from string to integer data type in C++ programming. In this article, we will discuss integer to string conversion through different methods using C++ libraries. Make sure you always provide a valid string because it will generate an error in case if the string is not valid. However, we can check the string validity through different functions available in the coding language. There is basically two most common method for converting a string.

Given below are the two methods with the syntax for converting a string from integer data type to string data type:

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

By using the to_string() method in your code.

string string_name = to_string (x);

In the above syntax, string_name can be anything a user wants but the parameter x passing into string function is the string defined by the user for conversion.

By using stringstream class.

stringstream string_name;

In the above syntax, string_name can be anything a user wants but an insertion operation will be needed to insert the parameter into string defined by the user for conversion.

How to Convert Integer to String in C++?

Below are the different examples to convert C++ integer to string. Basically there are 2 ways to convert Integer to string in C++.

Example #1 – Using String Stream Class

stringstream class is a C++ stream class defined in the header file of code. To perform input-output operations. This stream class is used to perform string-based operations. Here is the C++ code to demonstrate the conversion of integer to string by using stringstream class:

Popular Course in this category
C++ Training (4 Courses, 5 Projects, 4 Quizzes)4 Online Courses | 5 Hands-on Projects | 37+ Hours | Verifiable Certificate of Completion | Lifetime Access | 4 Quizzes with Solutions
4.5 (4,899 ratings)
Course Price

View Course

Related Courses
Java Training (40 Courses, 29 Projects, 4 Quizzes)C Programming Training (3 Courses, 5 Project)

Code:

#include <iostream>
#include <sstream>
using namespace std ;
int main () {
int x ;
cout << " Please Enter an integer value for converting to string " ;
cin >> x ;
stringstream ss ;
ss << x ;
string s ;
ss >> s;
cout << " \n " << " The value of an integer is : " << x << " \n " ;
cout << " The string representation of an integer value is : " << s ;
}

Output:

C++ Int to String-1.1

Code Explanation: In the above code, you can see we have a main class with an integer x and a stringstream class. We have taken an input integer value from the user to convert it to a string using a stringstream class of C++ programming language. If you see the code properly we have included library names as stream to use the functionality of stream classes.

Example #2 – Using to_string() Method

Code:

#include <iostream>
#include <string>
using namespace std ;
int main ()
{
int x = 152 ;
float y = 25.69 ;
string str1 = to_string ( x ) ;
string str2 = to_string ( y ) ;
cout << " The string value of integer x is : " << str1 << " \n " ;
cout << " The string value of float y is : " << str2 ;
}

Output:

C++ Int to String-1.2

Code Explanation: In the above code, you can see we have a main class with an integer x and a float y inside the main class. Then we have defined two strings that we want to convert. One is str1 and another is str2. Therefore, with the help of the to_string() function, we can use these string of int and float and then convert it into string respectively by using to_string() function. We have taken an input integer value and a float value from the user to convert it to a string using the to_string() function of the string class of C++ programming language. If you see the code properly we have included library names as the string to use the functionality of string classes.

Example #3 – Using to_string() Method

Code:

// How to convert a number to string.
#include <iostream>
#include <string>
using namespace std ;
int main ()
{
// Declaring an integer
int int_val = 510 ;
// Declaring a float
float flo_val = 250.20 ;
// Conversion of an int into string using a to_string () method
string str1 = to_string ( int_val ) ;
// Conversion of float into string using to_string () method
string str2 = to_string ( flo_val ) ;
// Displaying the converted strings into given formats
cout << " The integer value in the string is : " ;
cout << str1 << endl ;
cout << " The float value in the string is : " ;
cout << str2 << endl ;
return 0 ;
}

Output:

C++ Int to String-1.3

Code Explanation: In the above code, you can see we have a main class with an integer value int_val and a float value flo_val inside the main class. Then we have defined two strings that we want to convert and we are passing the integer and float value as a parameter in the to_string() method. One is str1 and another is str2. Therefore, with the help of the to_string() function, we can use these string of int_val and flo_val and then convert it into string respectively by using to_string() function. We have taken an input integer value and a float value from the user to convert it to a string using the to_string() function of the string class of C++ programming language. If you see the code properly we have included library names as the string to use the functionality of string classes.

Conclusion

Conversion C++ Int to String becomes easy when we use the above-mentioned method and class. Otherwise, if we are going to implement traditional ways for conversion then it will require more memory space and time which will affect the coding efficiency.

Recommended Articles

This is a guide to C++ Int to String. Here we discuss the Introduction and how to convert an integer to string in C++ along with different examples and its code implementation. You may also look at the following articles to learn more –

  1. Armstrong Number in C++
  2. String in C
  3. String in C++
  4. C++ String Functions

C++ Training (4 Courses, 3 Projects, 4 Quizzes)

4 Online Courses

5 Hands-on Projects

37+ Hours

Verifiable Certificate of Completion

Lifetime Access

4 Quizzes with Solutions

Learn More

0 Shares
Share
Tweet
Share
Primary Sidebar
C plus plus Programming Tutorial
  • Advanced
    • C++ namespace
    • Encapsulation in C++
    • Access Modifiers in C++
    • Abstract Class in C++
    • C++ Class and Object
    • What is Template Class in C++?
    • C++ Algorithm
    • Data Structures and Algorithms C++
    • C++ Garbage Collection
    • Virtual Keyword in C++
    • Access Specifiers in C++
    • Storage Class in C++
    • Call by Value in C++
    • Multimap in C++
    • C++ Multiset
    • C++ Lambda Expressions
    • Stack in C++
    • C++ Static
    • C++ static_cast
    • Deque in C++
    • C++ Vector Functions
    • C++ 2D Vector
    • C++ List
    • C++ Mutable
    • Enum in C++
    • Abstraction in C++
    • Signal in C++
    • C++ Queue
    • Priority Queue in C++
    • Regular Expressions in C++
    • C++ Hash Table
    • File Handling in C++
    • C++ Stream
    • ifstream in C++
    • C++ ofstream
    • C++ fstream
    • C++ Read File
    • C++ iomanip
    • Macros in C++
    • Templates in C++
    • C++ setprecision
    • C++ Int to String
    • C++ thread( )
    • C++ Thread Pool
    • C++ thread_local
  • Basic
    • Introduction To C++
    • What is C++
    • Features of C++
    • Applications of C++
    • Best C++ Compiler
    • C++ Data Types
    • C++ Double
    • C++ unsigned int
    • User Defined Data Types in C++
    • Variables in C++
    • C++ Keywords
    • Pointers in C++
    • C++ Void Pointer
    • Function Pointer in C++
    • Iterator in C++
    • C++ Commands
    • Object in C++
    • C++ Literals
    • C++ Reference
    • C++ Undefined Reference
    • String in C++
    • C++ Programming Language (Basics)
    • C++ Identifiers
    • C++ Header Files
    • Type Casting in C++
    • C++ Formatter
  • Operators
    • C++ Operators
    • Arithmetic Operators in C++
    • Assignment Operators in C++
    • Bitwise Operators in C++
    • Relational Operators in C++
    • Boolean Operators in C++
    • Unary Operators in C++
    • C++ Operator[]
    • Operator Precedence in C++
    • C++ operator=()
  • Control Statements
    • Control Statement in C++
    • if else Statement in C++
    • Else If in C++
    • Nested if in C++
    • Continue Statement in C++
    • Break Statement in C++
    • Switch Statement in C++
    • goto Statement in C++
    • C++ Struct
    • Loops in C++
    • Do While Loop in C++
    • Nested Loop in C++
  • Functions
    • C++ String Functions
    • Math Functions in C++
    • Friend Function in C++
    • Recursive Function in C++
    • Virtual Functions in C++
    • strcat() in C++
    • swap() in C++
    • strcmp() in C++
    • ceil function in C++
    • C++ begin()
    • size() in C++
    • C++ test()
    • C++ any()
    • C++ Bitset
    • C++ find()
    • C++?Aggregation
    • C++?String append
    • C++ String Copy
    • C++ end()
    • C++ endl
    • C++ push_back
    • C++ shuffle()
    • malloc() in C++
    • C++ reserve()
    • C++ unique()
    • C++ sort()
    • C++ find_if()
    • Reflection in C++
    • C++ replace()
    • C++ search()
    • C++ Memset
    • C++ size_t
    • C++ Substring
    • C++ Max
    • C++ absolute value
    • C++ memcpy
    • C++ wchar_t
    • C++ free()
    • C++ sizeof()
    • C++ Move Semantics
  • Array
    • Arrays in C++
    • 2D Arrays in C++
    • 3D Arrays in C++
    • Multi-Dimensional Arrays in C++
    • C++ Array Functions
    • String Array in C++
    • C++ Length of Array
    • C++ arraylist
  • Constuctor and Destructor
    • Constructor and Destructor in C++
    • Constructor in C++
    • Destructor in C++
    • Copy Constructor in C++
    • Parameterized Constructor in C++
  • Overloading and overriding
    • Overloading and Overriding in C++
    • Overloading in C++
    • Overriding in C++
    • Function Overloading in C++
    • Function Overriding in C++
    • Method Overloading in C++
  • Inhertiance
    • Types of Inheritance in C++
    • Single Inheritance in C++
    • Multiple Inheritance in C++
    • Hierarchical Inheritance in C++
    • Multilevel Inheritance in C++
    • Hybrid Inheritance in C++
  • Sorting
    • Sorting in C++ 
    • Heap Sort in C++
    • C++ Vector Sort
    • Insertion Sort in C++
    • Selection Sort in C++
  • Programs
    • Patterns in C++
    • Star Patterns In c++
    • Swapping in C++
    • Reverse Number in C++
    • Palindrome Program in C++
    • Palindrome in C++
    • Factorial Program in C++
    • Fibonacci Series in C++
    • Square Root in C++
    • Random Number Generator in C++
    • Prime Number in C++
    • Leap Year Program in C++
    • Anagram in C++
    • Armstrong Number in C++
    • Reverse String in C++
    • Socket Programming in C++
    • Matrix Multiplication in C++
    • C++ using vs typedef
    • C++ vector vs list
    • C++ vector vs array
  • Interview question
    • C++ Interview Questions
    • Multithreading Interview Questions C++

Related Courses

C++ Training Course

Java Training Course

C Programming Course

Footer
About Us
  • Blog
  • Who is EDUCBA?
  • Sign Up
  • Corporate Training
  • Certificate from Top Institutions
  • Contact Us
  • Verifiable Certificate
  • Reviews
  • Terms and Conditions
  • Privacy Policy
  •  
Apps
  • iPhone & iPad
  • Android
Resources
  • Free Courses
  • Java Tutorials
  • Python Tutorials
  • All Tutorials
Certification Courses
  • All Courses
  • Software Development Course - All in One Bundle
  • Become a Python Developer
  • Java Course
  • Become a Selenium Automation Tester
  • Become an IoT Developer
  • ASP.NET Course
  • VB.NET Course
  • PHP Course

© 2020 - EDUCBA. ALL RIGHTS RESERVED. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.

EDUCBA
Free Software Development Course

Web development, programming languages, Software testing & others

*Please provide your correct email id. Login details for this Free course will be emailed to you
Book Your One Instructor : One Learner Free Class

Let’s Get Started

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you
EDUCBA Login

Forgot Password?

EDUCBA
Free Software Development Course

Web development, programming languages, Software testing & others

*Please provide your correct email id. Login details for this Free course will be emailed to you

Special Offer - C++ Training (4 Courses, 3 Projects, 4 Quizzes) Learn More