Lesson 4.4

# Conditional Statements Programming Exercises

Objective

If Else Programming Question
Nested If Programming Question
Switch Case Programming Question

Qu 1: Write a program to calculate leap year using IF Else statement between Years 2000 to Year 2050.

Qu 2: Write a program to calculate prime number using nested if else statements.

### Hints

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace nested_if
{
class Program
{
static void Main(string[] args)
{
label:
int count = 0;
Console.WriteLine("Enter a number to find all prime number under them: ");

if (num >= 2)
{
count = 0;
for (int i = 2; i <= num; i++)
{
if (num % i == 0)
{
count++;
}
}
if (count == 1)
{
Console.WriteLine(num + " is a prime number");
}
else
{
Console.WriteLine(num + " is not a prime number");
}
}
else
{
Console.WriteLine("Please enter number 2 or above 2");
goto label;
}
}
}
}

### Output

Enter a number to find all prime number under them: 37

37 is a prime number

__

Qu 3: Write a program to show some funny messages based on user input using switch case statements. The message should be like this:

• You are naughty.
• You are going to die after 70 years.
• You will have 5 kids, etc.

## Summary

In this chapter you have covered some programming exercises of if else, nested if else and switch case statements. In the next chapter we will learn Loop Statements in C#.