Lesson 14: if / else / else if

Now we turn a condition into a decision. In C#: if (condition) { ... } runs the block only if the condition is true. else { ... } runs when it's false, and else if (another) checks a further option. Note the C# syntax: the condition is in round parentheses ( ), and the body is in curly braces { } —

if is a fork in the road: if the condition is true you go into the if block; otherwise into the else block. else if adds another fork.

if (condition): Runs the block after it only if the condition is true. The condition is in parentheses.
else: The block that runs when the if's condition is false.
else if: Checks a further condition if the previous one didn't hold.
block { }: The curly braces wrapping the if/else body. The block itself doesn't end with ;.