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Expressions, Statements & Blocks

An interactive way to learn about Java expressions, statements, and code blocks

Learning Progress
Current Level:Basic
basic
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intermediate
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advanced
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Learning Mode
🔮 Prediction Practice
🧮 Expression Builder

Variables:

x = 5
y = 10
z = 3

Current Expression:

x

Add to Expression:

Variables:
Operators (Level: basic)
Parentheses:
📊 Order of Operations (PEMDAS)
1Parentheses: ( )
2Exponents: ** (advanced level)
3MDultiplication & Division: *, /, % (left to right)
4ASddition & Subtraction: +, - (left to right)

Learning Tips:

  • Start with simple expressions using +, - operators
  • Use prediction mode to test your understanding
  • Compare: x + y * z vs (x + y) * z
  • Complete challenges to unlock higher levels
Expressions Demo
Live Java representation with highlighted changes
public class ExpressionDemo {
    public static void main(String[] args) {
        int x = 5;
        int y = 10;
        int z = 3;
        
        // Expression: x
    }
}
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