← C# Foundations

Lesson 3 of 6

Control Flow and Loops

int xp = 45;

if (xp >= 50)
{
    Console.WriteLine("Level up!");
}
else
{
    Console.WriteLine($"Keep going, {50 - xp} XP to go.");
}

for (int i = 1; i <= 5; i++)
{
    Console.WriteLine($"Lesson {i}");
}

foreach (var lang in new[] { "C#", "Python", "JavaScript" })
{
    Console.WriteLine(lang);
}

The pieces

if / else branch on a boolean condition.
for (init; condition; increment) is best when you know how many times to loop.
foreach (var item in collection) visits every element of an array or collection without needing an index, use it whenever you don't need the index itself.

📝 Control Flow Quiz

Passing score: 70%

1.Which loop is the best fit for visiting every element of a collection without needing an index?
forforeachwhiledo-while
2.A for loop has three parts separated by semicolons: initializer, condition, and ____.
3.An if statement in C# requires its condition to evaluate to a boolean.
TrueFalse