Overview

In this tutorial, we will learn about C++ Decrement Operator with examples.

Decrement Operator

The decrement operator in C++ is denoted as a — operator symbol. We can apply the operator before or after the variable.

Pre-decrement operator

A pre-decrement operator is used to decrement the value of the variable before evaluating the expression.

cout << “—— Post-Decrement ——-” << endl;
int number = 10;
cout << “@Before number is = ” << number << endl;
int resultExpr = –number;
cout << “resultExpr is = ” << resultExpr << endl;
cout << “@After number is = ” << number << endl;

 

The value of the variable is first decremented and then used in the expression.

Post-decrement operator

A post-decrement operator is used to decrement the value of the variable after evaluating the expression.

cout << “—— Post-Decrement ——-” << endl;
int number = 10;
cout << “@Before number is = ” << number << endl;
int resultExpr = number–;
cout << “resultExpr is = ” << resultExpr << endl;
cout << “@After number is = ” << number << endl;

The value of the variable is used in the expression and decremented after that.

—— Post-Decrement ——-
@Before number is = 10
resultExpr is = 10
@After number is = 9

That’s it.

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C++ Tutorials

C++ Tutorials on this website:

https://www.testingdocs.com/c-coding-tutorials/

For more information on the current ISO C++ standard

https://isocpp.org/std/the-standard