Java · Theory

Control Statements in Java

Theory

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Control Statements in Java

Control statements decide which lines run and how many times. Real programs are not a straight list — they react to marks, menus, and input.

Three groups. Decision: if, else, switch pick a path. Loop: for, while, do-while repeat work. Jump: break stops a loop or switch; continue skips one round.

Learn if and for first. Then switch, while, break, continue. A loop with no stop condition never ends — say that in the viva.

Let's take this on the board with one tiny Main class — no extra files. Control Statements in Java — output: Pass. marks is 72, >= 40, so if runs. Change marks to 35 in your head — else prints Fail. Start from main, go line by line, and stop at each print. That output is the proof for Control Statements.

Exam tip

Say three groups: decision + loop + jump. One example each.

Example

// Control statements overview
public class Main {
  public static void main(String[] args) {
    int marks = 72;
    if (marks >= 40) {
      System.out.println("Pass");
    } else {
      System.out.println("Fail");
    }
  }
}

Control Statements in Java — output: Pass. marks is 72, >= 40, so if runs. Change marks to 35 in your head — else prints Fail.

Short notes

DefControl statements decide which lines run and how many times.
RuleDecision = if/switch. Loop = for/while. Jump = break/continue.
RememberLearn if + for first. Then the rest.
TrapA loop with no stop condition never ends.

Java · Theory

Control Statements in Java

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Theory

15/270

Control Statements in Java

Control statements decide which lines run and how many times. Real programs are not a straight list — they react to marks, menus, and input.

Three groups. Decision: if, else, switch pick a path. Loop: for, while, do-while repeat work. Jump: break stops a loop or switch; continue skips one round.

Learn if and for first. Then switch, while, break, continue. A loop with no stop condition never ends — say that in the viva.

Exam tip

Say three groups: decision + loop + jump. One example each.

Example

// Control statements overview
public class Main {
  public static void main(String[] args) {
    int marks = 72;
    if (marks >= 40) {
      System.out.println("Pass");
    } else {
      System.out.println("Fail");
    }
  }
}

Control Statements in Java — output: Pass. marks is 72, >= 40, so if runs. Change marks to 35 in your head — else prints Fail.

Short notes

DefControl statements decide which lines run and how many times.
RuleDecision = if/switch. Loop = for/while. Jump = break/continue.
RememberLearn if + for first. Then the rest.
TrapA loop with no stop condition never ends.

Control Statements in Java

Example

Short notes

Questions

Control Statements in Java

Example

Short notes

Questions