Branching

In C#, branching is used to execute different blocks of code depending on conditions. The main branching constructs use the if and else operators.

The if operator

Used to execute a block of code if the condition is true.


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bool isStudent = true;
if (isStudent)
{
    Console.WriteLine("You have to take exams.");
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The if-else operator

Allows you to execute one of two blocks of code depending on the condition.


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bool isStudent = true;
if (isStudent)
{
    Console.WriteLine("You have to take exams.");
}
else
{
    Console.WriteLine("You have to work.");
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Using conditional operators

Complex logical expressions can also be passed to conditional operators; the main requirement is that they return the logical type bool.


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bool isSunny = true; // is it sunny today
bool isWeekend = false; // is it a weekend today
// sunny AND weekend
if (isSunny && isWeekend)
{
    Console.WriteLine("Great time for a picnic!");
}
// sunny OR weekend
if (isSunny || isWeekend)
{
    Console.WriteLine("You can go for a walk.");
}
// today is NOT a weekend - it's a weekday
if (!isWeekend)
{
    Console.WriteLine("Today is a weekday.");
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Exercises

Write a function that, based on age and whether the person has a driver's license, tells whether they can drive a car. Function signature: bool CanDrive(int age, bool hasDriveLicense).


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bool CanDrive(int age, bool hasDriveLicense)
{
    // Your code
}
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Write a function that, depending on a numeric parameter, prints a message. If the number is > 0, the function prints The number is positive; if negative - The number is negative; if 0 - The number is zero. Function signature: void PrintNumberType(int number).


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void PrintNumberType(int number)
{
    // Your code
}
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