If statement execution flow in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of nested if-else statements

What is the output of the following C# code?

C Sharp (C#)

int x = 10;
int y = 20;
if (x > 5)
{
    if (y < 15)
        Console.WriteLine("A");
    else
        Console.WriteLine("B");
}
else
{
    Console.WriteLine("C");
}

A A

B No output

C C

D B

💡 Hint

Check the conditions inside both if statements carefully.

The outer if checks if x > 5, which is true (10 > 5). Then the inner if checks if y < 15, which is false (20 < 15 is false). So the else branch of the inner if runs, printing "B".

❓ Predict Output

intermediate

If-else if-else chain output

What will be printed when this code runs?

C Sharp (C#)

int score = 75;
if (score >= 90)
    Console.WriteLine("Excellent");
else if (score >= 70)
    Console.WriteLine("Good");
else
    Console.WriteLine("Try again");

A Try again

B Good

C Excellent

D No output

💡 Hint

Check which condition matches the score value first.

The score is 75, which is not >= 90, so the first if is false. The else if checks if score >= 70, which is true, so it prints "Good" and skips the else.

❓ Predict Output

advanced

If statement with multiple conditions

What is the output of this code snippet?

C Sharp (C#)

int a = 5;
int b = 10;
if (a > 0 && b < 5)
    Console.WriteLine("X");
else if (a > 0 || b < 5)
    Console.WriteLine("Y");
else
    Console.WriteLine("Z");

A Y

B No output

C Z

D X

💡 Hint

Evaluate each condition carefully using logical AND and OR.

The first if condition (a > 0 && b < 5) is false because b < 5 is false (10 < 5 is false). The else if condition (a > 0 || b < 5) is true because a > 0 is true. So it prints "Y".

❓ Predict Output

advanced

If statement with assignment inside condition

What will be printed by this code?

C Sharp (C#)

int x = 0;
if ((x = 5) > 3)
    Console.WriteLine(x);
else
    Console.WriteLine("No");

A 5

B 0

C No

D Compilation error

💡 Hint

Remember that assignment inside if condition changes the variable value.

The assignment (x = 5) sets x to 5, then checks if 5 > 3, which is true. So it prints the value of x, which is 5.

🧠 Conceptual

expert

If statement execution flow with multiple conditions and side effects

Consider the following code. What is the final value of variable result after execution?

C Sharp (C#)

int a = 2;
int b = 3;
int result = 0;
if (a++ > 2 && ++b > 3)
    result = a + b;
else
    result = a - b;

A result = 6

B result = 3

C result = 0

D result = 5

💡 Hint

Remember how post-increment and pre-increment operators work and short-circuit evaluation.

The condition a++ > 2 evaluates as 2 > 2 (false), but a is incremented to 3 after. Because the first condition is false, the second condition (++b > 3) is not evaluated due to short-circuit AND. b remains 3. So the else branch runs: result = a - b = 3 - 3 = 0.