If statement in Java - Step-by-Step Execution

Concept Flow - If statement

Start

↓

Evaluate condition

↓

Execute 'if' block

↓

Continue

↓

Skip 'if' block

↓

Continue

The program checks a condition. If true, it runs the code inside the if block. If false, it skips it and continues.

Execution Sample

Java

int x = 10;
if (x > 5) {
    System.out.println("x is greater than 5");
}
System.out.println("Done");

Checks if x is greater than 5 and prints a message if true, then prints 'Done'.

Execution Table

Step	Condition (x > 5)	Result	Branch Taken	Output
1	10 > 5	true	Execute if block	x is greater than 5
2	N/A	N/A	Continue after if	Done
3	N/A	N/A	Program ends	No more output

💡 Program ends after printing both messages.

Variable Tracker

Variable	Start	After Step 1	After Step 2	Final
x	10	10	10	10

Key Moments - 2 Insights

Why does the code inside the if block run only when the condition is true?

Because the if statement checks the condition (x > 5). If it is true (see execution_table step 1), it runs the code inside. If false, it skips it (not shown here).

What happens if the condition is false?

The program skips the if block and continues with the next statements after it, as shown in the 'Branch Taken' column for false (not in this example but explained in concept_flow).

Visual Quiz - 3 Questions

Look at the execution table, what is the output at step 1?

A x is greater than 5

B Done

C No output

D Error

💡 Hint

Check the 'Output' column in execution_table row for step 1.

At which step does the program print "Done"?

A Step 1

B Step 2

C Step 3

D Never

💡 Hint

Look at the 'Output' column for step 2 in execution_table.

If x was 3 instead of 10, what would happen at step 1?

A Condition true, print "x is greater than 5"

B Error because x is less than 5

C Condition false, skip if block

D Program stops

💡 Hint

Refer to concept_flow and key_moments about condition false behavior.

Concept Snapshot

If statement syntax:
if (condition) {
    // code runs if condition is true
}

Checks condition once.
Runs block only if true.
Skips block if false.

Full Transcript

This example shows how an if statement works in Java. The program sets x to 10. It checks if x is greater than 5. Since 10 is greater than 5, it prints "x is greater than 5". Then it prints "Done". If the condition was false, it would skip the first print and only print "Done". The flow diagram shows the decision path. The execution table tracks each step, condition result, branch taken, and output. The variable tracker shows x stays 10 throughout. Key moments clarify why the if block runs only when true and what happens if false. The quiz tests understanding of outputs and condition effects. The snapshot summarizes the if statement basics.