Menu
×
My W3Schools Get Certified Spaces For Teachers Plus Get Certified Spaces For Teachers Plus
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

C++ Tutorial

C++ HOME C++ Intro C++ Get Started C++ Syntax
Syntax Statements
C++ Output
Print Text Print Numbers New Lines
C++ Comments C++ Variables
Declare Variables Multiple Variables Identifiers Constants Real-Life Examples
C++ User Input C++ Data Types
Basic Data Types Numbers Booleans Characters Strings Real-Life Example
C++ Operators
Arithmetic Assignment Comparison Logical
C++ Strings
Strings Intro Concatenation Numbers and Strings String Length Access Strings Special Characters User Input Strings Omitting Namespace C-Style Strings
C++ Math C++ Booleans
Boolean Values Boolean Expressions Real-Life Example
C++ If...Else
if else else if Short hand if..else Real-Life Examples
C++ Switch C++ While Loop
While Loop Do/While Loop Real-Life Examples
C++ For Loop
For Loop Nested Loops The foreach Loop Real-Life Examples
C++ Break/Continue C++ Arrays
Arrays Arrays and Loops Omit Array Size Get Array Size Real-Life Example Multidimensional Arrays
C++ Structures C++ Enums C++ References
Create References Memory Address
C++ Pointers
Create Pointers Dereferencing Modify Pointers

C++ Functions

C++ Functions C++ Function Parameters
Parameters/Arguments Default Parameter Multiple Parameters Return Values Pass By Reference Pass Arrays Real-Life Example
C++ Function Overloading C++ Scope C++ Recursion

C++ Classes

C++ OOP C++ Classes/Objects C++ Class Methods C++ Constructors C++ Access Specifiers C++ Encapsulation C++ Inheritance
Inheritance Multilevel Inheritance Multiple Inheritance Access Specifiers
C++ Polymorphism C++ Files C++ Exceptions C++ Date

C++ Data Structures

C++ Data Structures & STL C++ Vectors C++ List C++ Stacks C++ Queues C++ Deque C++ Sets C++ Maps C++ Iterators C++ Algorithms

C++ How To

C++ Add Two Numbers C++ Random Numbers

C++ Reference

C++ Reference C++ Keywords C++ <iostream> C++ <fstream> C++ <cmath> C++ <string> C++ <cstring> C++ <ctime> C++ <vector> C++ <algorithm>

C++ Examples

C++ Examples C++ Real-Life Examples C++ Compiler C++ Exercises C++ Quiz C++ Syllabus C++ Certificate


C++ vector size() function

❮ Vector Functions

Example

Find out the size of a vector:

vector<string> cars = {"Volvo", "BMW", "Ford", "Mazda"};
cout << cars.size();
Try it Yourself »

Definition and Usage

The size() function returns the number of elements in a vector.

Syntax

vector.size();

Parameter Values

None.

Technical Details

Returns: The number of elements in a vector.

Related Pages

Read more about vectors in our Vector Tutorial.

❮ Vector Functions

PLUS
SPACES
GET CERTIFIED
FOR TEACHERS
FOR BUSINESS
CONTACT US
×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

Top Tutorials
HTML Tutorial
CSS Tutorial
JavaScript Tutorial
How To Tutorial
SQL Tutorial
Python Tutorial
W3.CSS Tutorial
Bootstrap Tutorial
PHP Tutorial
Java Tutorial
C++ Tutorial
jQuery Tutorial
Top References
HTML Reference
CSS Reference
JavaScript Reference
SQL Reference
Python Reference
W3.CSS Reference
Bootstrap Reference
PHP Reference
HTML Colors
Java Reference
Angular Reference
jQuery Reference
Top Examples
HTML Examples
CSS Examples
JavaScript Examples
How To Examples
SQL Examples
Python Examples
W3.CSS Examples
Bootstrap Examples
PHP Examples
Java Examples
XML Examples
jQuery Examples
Get Certified
 HTML Certificate
CSS Certificate
JavaScript Certificate
Front End Certificate
SQL Certificate
Python Certificate
PHP Certificate
jQuery Certificate
Java Certificate
C++ Certificate
C# Certificate
XML Certificate
FORUM ABOUT ACADEMY
W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness
of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.