Web Reference: Variables are used for storing values. In this example, change the values of variables to affect the composition. // Example 4-1: Variable declaration and initialization examples int count = 0; // Declare an int named count, assigned the value 0 char letter = 'a'; // Declare a char named letter, assigned the value 'a' double d = 132.32; // Declare a double named d, assigned the value 132.32 boolean happy = false; // Declare a boolean named happy, assigned ... Variables declared outside of a function (usually at the top of a sketch) are considered global variables which means they can be used anywhere in the sketch. Variables declared within a function are called local variables and can only be sued in that function.
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