Else-if ladder execution in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of else-if ladder with multiple true conditions

What will be the output of the following C# code?

C Sharp (C#)

int x = 15;
if (x > 10)
{
    Console.WriteLine("Greater than 10");
}
else if (x > 5)
{
    Console.WriteLine("Greater than 5");
}
else
{
    Console.WriteLine("5 or less");
}

A 5 or less

B Greater than 5

C Greater than 10

D No output

💡 Hint

Remember, in an else-if ladder, only the first true condition's block runs.

Since x is 15, the first condition (x > 10) is true, so it prints "Greater than 10" and skips the rest.

❓ Predict Output

intermediate

Output when no conditions in else-if ladder are true

What will be the output of this C# code snippet?

C Sharp (C#)

int y = 3;
if (y > 10)
{
    Console.WriteLine("Greater than 10");
}
else if (y > 5)
{
    Console.WriteLine("Greater than 5");
}
else
{
    Console.WriteLine("5 or less");
}

A 5 or less

B Greater than 10

C Greater than 5

D No output

💡 Hint

Check which conditions are false and what the else block does.

Since y is 3, both if and else-if conditions are false, so the else block runs printing "5 or less".

🔧 Debug

advanced

Identify the error in else-if ladder syntax

Which option contains a syntax error in the else-if ladder?

C Sharp (C#)

int z = 7;
if (z > 10)
{
    Console.WriteLine("Greater than 10");
}
else if (z > 5)
{
    Console.WriteLine("Greater than 5");
}
else
{
    Console.WriteLine("5 or less");
}

A if (z > 10) { Console.WriteLine("Greater than 10"); } else if z > 5 { Console.WriteLine("Greater than 5"); } else { Console.WriteLine("5 or less"); }

B if (z > 10) { Console.WriteLine("Greater than 10"); } else if (z > 5) { Console.WriteLine("Greater than 5"); } else { Console.WriteLine("5 or less"); }

C } ;)"ssel ro 5"(eniLetirW.elosnoC { esle } ;)"5 naht retaerG"(eniLetirW.elosnoC { )5 > z( fi esle } ;)"01 naht retaerG"(eniLetirW.elosnoC { )01 > z( fi

D if (z > 10) { Console.WriteLine("Greater than 10"); } else if (z > 5) Console.WriteLine("Greater than 5"); else { Console.WriteLine("5 or less"); }

💡 Hint

Check the syntax of the else-if condition carefully.

Option A is missing parentheses around the else-if condition, causing a syntax error.

🚀 Application

advanced

Determine the final value after else-if ladder execution

What is the value of variable result after running this code?

C Sharp (C#)

int score = 85;
string result;
if (score >= 90)
{
    result = "Excellent";
}
else if (score >= 75)
{
    result = "Good";
}
else if (score >= 60)
{
    result = "Pass";
}
else
{
    result = "Fail";
}

A "Fail"

B "Good"

C "Pass"

D "Excellent"

💡 Hint

Check which condition matches the score 85 first.

85 is not >= 90, so first if is false. 85 >= 75 is true, so result is set to "Good" and ladder stops.

🧠 Conceptual

expert

Understanding else-if ladder execution flow

Consider this else-if ladder. Which statement best describes how it executes?

C Sharp (C#)

int n = 20;
if (n < 10)
{
    Console.WriteLine("Less than 10");
}
else if (n < 20)
{
    Console.WriteLine("Less than 20");
}
else if (n == 20)
{
    Console.WriteLine("Equal to 20");
}
else
{
    Console.WriteLine("Greater than 20");
}

A All true conditions will execute their blocks in order.

B The else block executes only if all conditions are true.

C The program will print multiple lines if multiple conditions are true.

D Only the first true condition's block executes; others are skipped.

💡 Hint

Think about how else-if ladder controls flow after a true condition.

In an else-if ladder, once a true condition is found, its block runs and the rest are skipped.