If statement in Go - 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

Go

package main
import "fmt"
func main() {
  x := 10
  if x > 5 {
    fmt.Println("x is greater than 5")
  }
}

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

Execution Table

Step	Condition (x > 5)	Result	Branch Taken	Output
1	10 > 5	True	Execute if-block	x is greater than 5
2	End of if statement	N/A	Continue

💡 Condition true, if-block executed once, then program continues.

Variable Tracker

Variable	Start	After Step 1	Final
x	undefined	10	10

Key Moments - 2 Insights

Why does the program print the message only when x is greater than 5?

Because the if statement checks the condition 'x > 5'. If true (see execution_table step 1), it runs the print command inside the if-block.

What happens if the condition is false?

The program skips the if-block and continues without printing anything, as shown in the 'Branch Taken' column for false conditions.

Visual Quiz - 3 Questions

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

A True

B False

C Undefined

D Error

💡 Hint

Check the 'Condition (x > 5)' and 'Result' columns in execution_table row 1.

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

A Step 2

B Step 1

C Before Step 1

D After Step 2

💡 Hint

Look at the 'Branch Taken' column in execution_table row 1.

If x was 3 instead of 10, what would happen in the execution table?

A Condition would be true and print message

B Program would crash

C Condition would be false and skip if-block

D Output would be empty but branch taken is execute if-block

💡 Hint

Refer to how condition affects branch taken in execution_table and key_moments.

Concept Snapshot

If statement syntax:
if condition {
  // code runs if condition is true
}
Checks condition once.
Runs code block only if true.
Skips block if false.

Full Transcript

This visual execution shows how an if statement works in Go. The program starts and evaluates the condition 'x > 5'. If the condition is true, it executes the code inside the if-block, printing a message. If false, it skips the block and continues. The variable x is set to 10 before the check. The execution table traces each step, showing the condition evaluation, branch taken, and output. Key moments clarify why the message prints only when the condition is true and what happens if false. The quiz tests understanding of condition results, branch decisions, and changes if x changes. The snapshot summarizes the if statement syntax and behavior simply.