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

Concept Flow - If-else execution flow

Start

↓

Evaluate condition

↓

Execute if-block

↓

End if-block

↓

End

↓

Execute else-block

↓

End else-block

↓

End

The program checks a condition. If true, it runs the 'if' part; if false, it runs the 'else' part. Then it continues after the if-else.

Execution Sample

C Sharp (C#)

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

This code checks if x is greater than 5 and prints a message accordingly.

Execution Table

Step	Condition (x > 5)	Result	Branch Taken	Output
1	10 > 5	True	If-block	"x is greater than 5" printed
2	N/A	N/A	End	Program continues after if-else

💡 Condition true, if-block executed, else-block skipped, then program continues

Variable Tracker

Variable	Start	After Step 1	Final
x	10	10	10

Key Moments - 2 Insights

Why does the else-block not run when the condition is true?

Because the condition evaluated to true at step 1, the program executes only the if-block and skips the else-block as shown in the execution_table.

What happens if the condition is false?

If the condition were false, the program would skip the if-block and execute the else-block instead, as shown in the concept_flow diagram.

Visual Quiz - 3 Questions

Look at the execution_table, what is the output at step 1?

A "x is 5 or less" printed

B No output

C "x is greater than 5" printed

D Error message

💡 Hint

Check the 'Output' column in the first row of the execution_table.

At which step does the program decide which branch to take?

A Step 1

B Step 2

C Before Step 1

D After Step 2

💡 Hint

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

If x was 3 instead of 10, which branch would be taken according to the concept_flow?

A If-block

B Else-block

C Both if and else blocks

D Neither block

💡 Hint

Refer to the concept_flow where condition false leads to else-block execution.

Concept Snapshot

if (condition) {
  // code runs if condition is true
} else {
  // code runs if condition is false
}
The program checks the condition once and runs only one block.

Full Transcript

This visual execution shows how an if-else statement works in C#. The program starts by evaluating the condition (x > 5). If the condition is true, it runs the code inside the if-block and skips the else-block. If false, it runs the else-block instead. Variables keep their values unless changed inside the blocks. The execution table traces each step, showing condition evaluation, branch taken, and output. Key moments clarify why only one block runs and what happens if the condition changes. The quiz tests understanding by asking about outputs and decision steps.