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Java - if...elseJava - switch StatementJava - Loop ControlJava - for LoopJava - for-each Loop

Java - Loop Control Overview

📌 What You Will Learn
  • The small building blocks of Java: tokens
  • All 8 primitive data types with their ranges
  • Type casting — implicit and explicit
  • Control statements: if, switch, loops
  • Arrays — single, double and jagged
  • Variable length arguments (var-args)

Loop Control Overview is a core concept of the Java language. This lesson explains Java Statements (Control Flow) with complete, runnable code examples, clear step-by-step explanations, and common mistakes to avoid with exam-style MCQs at the end.

Java Statements (Control Flow)

Statements decide the flow of the program — which code runs, when, and how many times. There are two families:

  • Decision making (selection) — if, if-else, if-else if, switch.
  • Looping (iteration) — for, while, do-while.

Plus two jumping statements: break and continue.

📝 Key Takeaways
  • Tokens are the smallest pieces of a program: identifiers, literals, keywords, operators, separators.
  • Java has 8 primitive types: byte, short, int, long, float, double, char, boolean.
  • Widening casting is automatic and safe; narrowing casting needs brackets and may lose data.
  • if / switch decide which path runs; for / while / do-while repeat code; break and continue control loops.
  • Arrays hold many same-type values; index starts at 0; size is fixed; for-each loop reads them simply.
  • Var-args (int... x) lets a method take any number of arguments.

🧠 Test Your Knowledge

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