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C++ algorithm swap() function

❮ Algorithm Functions

Example

Swap the values of two variables:

int a = 10, b = 25;
cout << "Before: a = " << a << " | b = " << b << "\n";
swap(a, b);
cout << "After:  a = " << a << " | b = " << b << "\n";
Try it Yourself »

Definition and Usage

The swap() function swaps the values of two variables, such that each variable has the value that the other variable had before the swap occurred.

Both variables must have the same data type.

Syntax

swap(a, b);

Parameter Values

Parameter Description
a Required. Any variable.
b Required. A variable with the same data type as a.

Related Pages

Read more about data structures in our Data Structures Tutorial.

Read more about iterators in our Iterators Tutorial.

Read more about algorithms in our Algorithms Tutorial.

❮ Algorithm Functions