If statement execution flow in C Sharp (C#) - Step-by-Step Execution

Concept Flow - If statement execution flow

Evaluate condition

↓

Condition True?

No→Skip if block

Yes↓

Execute if block

↓

Continue with rest of code

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

Execution Sample

C Sharp (C#)

int x = 10;
if (x > 5)
{
    Console.WriteLine("x is greater than 5");
}

Checks if x is greater than 5 and prints a message if true.

Execution Table

Step	Condition	Evaluation	Branch Taken	Action	Output
1	x > 5	10 > 5 is True	Yes	Execute if block	x is greater than 5
2	End of if	N/A	N/A	Continue with rest of code

💡 Condition evaluated once; since true, if block executed; then program continues.

Variable Tracker

Variable	Start	After Step 1	Final
x	10	10	10

Key Moments - 2 Insights

Why does the program skip the if block sometimes?

If the condition is false (see execution_table step 1), the program does not run the if block and moves on.

Is the condition checked more than once?

No, the condition is evaluated once at step 1 in the execution_table.

Visual Quiz - 3 Questions

Look at the execution table, what is the condition evaluation result at step 1?

A "10 > 5 is False"

B "x == 5 is True"

C "10 > 5 is True"

D "x < 5 is True"

💡 Hint

Check the 'Evaluation' column in execution_table row 1.

At which step does the program decide to execute the if block?

A Step 2

B Step 1

C Step 3

D No step executes the if block

💡 Hint

Look at the 'Branch Taken' and 'Action' columns in execution_table.

If x was 3 instead of 10, how would the execution_table change at step 1?

A Condition evaluation would be "3 > 5 is False" and if block skipped

B Condition evaluation would be "3 > 5 is True"

C Condition evaluation would be "3 == 5 is True"

D No change in execution_table

💡 Hint

Think about how the condition result affects the branch taken in execution_table step 1.

Concept Snapshot

if (condition) {
    // code runs only if condition is true
}

- Condition is checked once.
- If true, code inside runs.
- If false, code inside is skipped.
- Program continues after if block.

Full Transcript

This visual execution shows how an if statement works in C#. The program first evaluates the condition. If the condition is true, it runs the code inside the if block. If false, it skips that code and continues. In the example, x is 10, so the condition x > 5 is true, and the message is printed. Variables do not change during this process. The key points are that the condition is checked once and controls whether the if block runs or not.