If–else statement in Go - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of nested if–else in Go

What is the output of this Go program?

Go

package main
import "fmt"
func main() {
  x := 10
  if x > 5 {
    if x < 15 {
      fmt.Println("A")
    } else {
      fmt.Println("B")
    }
  } else {
    fmt.Println("C")
  }
}

A A

B B

C C

D No output

💡 Hint

Check the conditions step by step from outer to inner if.

x is 10, which is greater than 5 and less than 15, so the inner if prints "A".

❓ Predict Output

intermediate

If–else with else if in Go

What will this Go program print?

Go

package main
import "fmt"
func main() {
  score := 75
  if score >= 90 {
    fmt.Println("Excellent")
  } else if score >= 60 {
    fmt.Println("Pass")
  } else {
    fmt.Println("Fail")
  }
}

A No output

B Excellent

C Fail

D Pass

💡 Hint

Check which condition matches the score 75.

75 is not >= 90 but is >= 60, so it prints "Pass".

❓ Predict Output

advanced

If–else with short statement and variable scope

What is the output of this Go code?

Go

package main
import "fmt"
func main() {
  if x := 5; x > 3 {
    fmt.Println(x)
  } else {
    fmt.Println("No")
  }
  // fmt.Println(x) // What if uncommented?
}

A Compilation error due to x scope

B No

C 5

D 0

💡 Hint

The variable x is declared in the if statement header.

x is 5 and greater than 3, so it prints 5. Outside the if block, x is not defined.

❓ Predict Output

advanced

If–else with multiple conditions

What does this Go program print?

Go

package main
import "fmt"
func main() {
  a, b := 3, 7
  if a > 5 && b < 10 {
    fmt.Println("X")
  } else if a > 2 || b > 10 {
    fmt.Println("Y")
  } else {
    fmt.Println("Z")
  }
}

A Y

B Z

C X

D No output

💡 Hint

Evaluate each condition carefully with given values.

a=3 > 2 is true, so the else if condition is true and prints "Y".

🧠 Conceptual

expert

Understanding if–else statement behavior in Go

Which statement about if–else statements in Go is TRUE?

A The condition in an if statement must always be enclosed in parentheses.

B The else keyword must always be on the same line as the closing brace of the if block.

C Go allows if statements without braces if there is only one statement inside.

D Variables declared in the if statement header are accessible outside the if–else blocks.

💡 Hint

Think about Go syntax rules for if–else formatting.

In Go, else must be on the same line as the closing brace of the if block; variables declared in if header are scoped to the if block; braces are mandatory; conditions are not enclosed in parentheses.