| 1 |
Variable is a box for data storage. In the different boxes can be data of different types, for example, text (string), integer number (int) or yes or no (bool). |
| 2 |
For creating a variable you need to specify a type for it (what kind data will be to storage in this box), name (how you can call it) and also after the sign "equally" you need to specify a value (it always has the same type which this variable has). |
| 3 |
The conditional operator is an operator, which lets to run different actions depending on the condition. A condition is an expression that can be answered about whether it is true or not (i.e. "yes" or "no"). |
| 4 |
For using the conditional operator in your code you need to use the operator if...else. Also, you can use more one condition, then conditionals will be to check step by step. |
| 5 |
A loop is multiple repeating of the same actions. We know two Loop types - it is the loop for (the loop with counter) and the loop while (the loop with the condition). |
| 6 |
The loop uses a counter for changing something. It has a beginning value, a condition for loop ending and actions after every loop step. In the loop, while we must specify a condition under which the loop actions are performed (if this condition is not correct, then the program don't run loop actions). |
| 7 |
An array is a box set with the same type. An array lets to storage some values with the same type at the same time. For example, it can be a few integer numbers or words. It's important to remember that array numbering begins from zero. |
| 8 |
Methods (or functions) are mini-programs, which allow you to avoid duplicate code. It is the special boxes, which get input data, to do something and return something from this box(or don't return). |
| 9 |
To return something from a function, you need to use the command return. When writing a function, we specify a type of return value. If you don't need to return something, you must use the type void. |
| 10 |
OOP is object-oriented programming. The main definitions are class and object. Class is a sketch and the object is the specific implementation of this class. Class constructor is a specific method for setting to begin properties when creating an object. |
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