Else–if ladder in Go - Cheat Sheet & Quick Revision

Recall & Review

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What is an else-if ladder in Go?

An else-if ladder is a way to check multiple conditions one after another. It uses if, else if, and else blocks to decide which code to run based on conditions.

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How do you write an else-if ladder in Go?

You start with an if statement, then add one or more else if statements, and optionally end with an else statement. Each checks a condition in order.

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What happens if none of the conditions in an else-if ladder are true?

If none of the if or else if conditions are true, the code inside the else block runs. If there is no else block, nothing happens.

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Can you have multiple else if blocks in a Go else-if ladder?

Yes, you can have as many else if blocks as you want. Go checks each condition in order until one is true.

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Write a simple else-if ladder in Go that prints "small", "medium", or "large" based on a number variable.

Example: var size int = 10 if size < 5 { fmt.Println("small") } else if size < 15 { fmt.Println("medium") } else { fmt.Println("large") }

In Go, what keyword starts an else-if ladder?

A if

B else

C elseif

D elif

The else-if ladder always starts with an if statement in Go.

What happens if multiple else-if conditions are true in Go?

A All true blocks run

B None run

C The last true block runs

D Only the first true block runs

Go runs only the first block whose condition is true in an else-if ladder.

Which of these is the correct else-if syntax in Go?

A else if condition { }

B elseif condition { }

C elif condition { }

D else(condition) { }

Go uses 'else if' with a space, not 'elseif' or 'elif'.

Is the else block mandatory in an else-if ladder in Go?

A Only if there are multiple else ifs

B Yes, always required

C No, it is optional

D Only if the first if is false

The else block is optional; you can have just if and else if blocks.

What will this code print if x = 20? if x < 10 { fmt.Println("Low") } else if x < 30 { fmt.Println("Medium") } else { fmt.Println("High") }

A Low

B Medium

C High

D Nothing

Since 20 is less than 30 but not less than 10, the else if block runs and prints "Medium".

Explain how an else-if ladder works in Go and why it is useful.

Think about checking different cases one by one.

Write a Go program snippet using an else-if ladder to categorize an integer score into grades: A, B, C, or F.

Use if, else if, and else blocks with comparison operators.