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Discover Switch Statements in C++

Another one of the most used logical operators in C++ is switch() statement. A switch statement allows you to check variable and you can branch to different cases in accordance with it’s value. Each cases can be defined for different values, and the variable being switched on is checked for each case.

When the switch expression is evaluated once, the value of the given expression is compared with the values of each listed case. If it see there is a match, the associated block of code in that case statement is executed till the break. Default case is optional and can be defined at the end of case list. switch() used with a variable (generally it is an integer number) and the cases are grouped inside { } brackets, like this below,

in each case you must start with case <number>: and end with break;

For example, you can indicate condition of items by numbers, in this example below, we have 3 conditions Bad, Normal. Let’s set condition =3 and see how switch() function works.

Here, we can also add all other numbers with default: case statement as given below.

This code will output “Unknown” if the value of condition is 0 or below 0 or upper than 3. You can add many code lines between case and break;

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About author

Dr. Yilmaz Yoru has 33+ years of coding with more than 30+ programming languages, mostly C++ on Windows, Android, Mac-OS, iOS, Linux, and some other operating systems. He was born in 1974, Eskisehir-Turkey, started coding in college and graduated from the department of Mechanical Engineering of Eskisehir Osmangazi University in 1997. He worked as a research assistant at the same university for more than 10 years. He received his MSc and PhD degrees from the same department at the same university. Since 2012, he is the founder and CEO of Esenja LLC Company. He has married and he is a father of a son. Some of his interests are Programming, Thermodynamics, Fluid Mechanics, Artificial Intelligence, 2D & 3D Designs, and high-end innovations.
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