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

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of mixed arithmetic operations

What is the output of the following C# code?

C Sharp (C#)

int a = 10;
int b = 3;
int result = a / b * b + a % b;
Console.WriteLine(result);

A 10

B 9

C 12

D 3

💡 Hint

Remember integer division truncates the decimal part.

Integer division 10 / 3 equals 3, then 3 * 3 = 9, plus remainder 10 % 3 = 1, total 10.

❓ Predict Output

intermediate

Result of floating-point arithmetic

What will be printed by this C# code snippet?

C Sharp (C#)

double x = 5.0 / 2.0;
Console.WriteLine(x);

A 2

B 3

C 2.0

D 2.5

💡 Hint

Division with doubles keeps the decimal part.

Dividing 5.0 by 2.0 results in 2.5 as a double value.

❓ Predict Output

advanced

Understanding operator precedence

What is the output of this C# code?

C Sharp (C#)

int a = 4;
int b = 2;
int c = 3;
int result = a + b * c - b / c;
Console.WriteLine(result);

A 8

B 10

C 9

D 7

💡 Hint

Remember multiplication and division have higher precedence than addition and subtraction.

b * c = 2 * 3 = 6; b / c = 2 / 3 = 0 (integer division); so result = 4 + 6 - 0 = 10.

❓ Predict Output

advanced

Effect of parentheses on arithmetic operations

What will this C# code print?

C Sharp (C#)

int x = 8;
int y = 4;
int z = 2;
int result = (x + y) / z;
Console.WriteLine(result);

A 7

B 14

C 3

D 6

💡 Hint

Parentheses change the order of operations.

Parentheses cause x + y to be evaluated first: 8 + 4 = 12; then 12 / 2 = 6.

❓ Predict Output

expert

Complex arithmetic with mixed types

What is the output of this C# code?

C Sharp (C#)

int a = 7;
double b = 2.5;
var result = a / b + a % (int)b;
Console.WriteLine(result);

A 5.0

B 4.8

C 3.8

D 5.3

💡 Hint

Remember that % requires integers and division with double returns double.

a / b = 7 / 2.5 = 2.8; a % (int)b = 7 % 2 = 1; sum = 2.8 + 1 = 3.8.