Go Learning Notes - Part 3: If, Else If, Else Statements

Today I improved my Go Conference Booking App by adding conditional logic and better loop control. Instead of allowing any booking, I now validate user input using if, else if, and else statements.

Here’s what I learned:

Boolean Expressions in Go

In Go, conditions inside if statements must evaluate to a boolean (true or false).

Example from my program:

if userTickets < remainingTickets

This expression returns:

• true - booking is allowed
• false - booking is denied

Comparison operators I used:
< less than
== equal to
> greater than

If Statement (Main Booking Logic)

if userTickets < remainingTickets {
    remainingTickets = remainingTickets - userTickets
    bookings = append(bookings, fName+" "+lName)
}

What This Does:

• Checks if enough tickets are available
• Deducts tickets
• Saves the booking
• Displays confirmation

This made my app smarter and prevented overbooking.

Else If Statement

else if userTickets == remainingTickets {
    // do something else
}

This condition handles the case where:

• The user books exactly the remaining tickets It allows handling a special edge case separately.

Else Statement (Invalid Booking)

else {
    fmt.Printf("We only have %v tickets, so you can't book %v tickets.\n", remainingTickets, userTickets)
}

This runs when:

• The user tries to book more tickets than available

Now my program protects against invalid input.

Infinite Loop with Condition-Based Exit

The booking system runs inside:

for {

This creates an infinite loop.

But I added a stopping condition:

if remainingTickets == 0 {
    fmt.Println("Our Conference is fully booked. Come back next year!")
    break
}

break Statement

The break keyword:

• Immediately exits the loop
• Stops the program once tickets are sold out

Without break, the loop would continue forever.

Today I learned how to use boolean expressions and if, else if, and else statements to control the flow of a Go program. I practiced validating user input and handling different booking scenarios to prevent overbooking. I also learned how to use break to stop an infinite loop when tickets are sold out. Combining conditionals with loops and slices made my program smarter and more dynamic.