Arduino Syntax for Declaring ints

This video is an introduction to the syntax of declaring variables in the C++ language in the Arduino IDE. We demonstrate the syntax by creating int (integer) variables.

We also show some typical syntax errors. One error is caused by a failure to declare a variable before it is used. The other error is caused by failing to end each statement with a semicolon.

Instead of focusing on the errors, we could make these positive statements:
1. All variables must be declared before they are used, and
2. All statements must end with a semicolon.
These syntax rules are very basic, but the errors caused by violating these rules are very confusing to students.