Comparison operators in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of chained comparison operators

What is the output of this C# code snippet?

C Sharp (C#)

int a = 5;
int b = 10;
int c = 15;
Console.WriteLine(a < b && b < c);

A True

B False

C Compilation error

D Runtime exception

💡 Hint

Think about how logical AND works with comparison operators.

The expression checks if a is less than b AND b is less than c. Both are true, so the output is True.

❓ Predict Output

intermediate

Result of equality and assignment operators

What will be printed by this code?

C Sharp (C#)

int x = 7;
int y = 7;
Console.WriteLine(x == y);

A 7

B False

C Compilation error

D True

💡 Hint

Check if x and y have the same value.

The '==' operator compares values. Since x and y are both 7, the result is True.

❓ Predict Output

advanced

Output of mixed comparison and logical operators

What is the output of this code?

C Sharp (C#)

int a = 3;
int b = 4;
int c = 5;
Console.WriteLine(a < b || b > c && c == 5);

A False

B Compilation error

C True

D Runtime exception

💡 Hint

Remember operator precedence: && before ||.

The expression evaluates as (a < b) || ((b > c) && (c == 5)). a < b is true, so the whole expression is true.

❓ Predict Output

advanced

Value of variable after comparison and assignment

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

C Sharp (C#)

int x = 10;
int y = 20;
bool result = x > y;
result = !result;
Console.WriteLine(result);

A False

B True

C 10

D Compilation error

💡 Hint

Check the initial comparison and then the negation.

x > y is false, negating it with ! makes result true.

❓ Predict Output

expert

Output of complex comparison with nullable types

What will this code print?

C Sharp (C#)

int? a = null;
int? b = 5;
Console.WriteLine(a < b);

A False

B True

C Compilation error

D Runtime exception

💡 Hint

Consider how nullable comparisons behave in C#.

When comparing nullable ints, if one is null, the result is false for < operator.