Conditionals

We use conditional statements in code to help us make decisions if a condition is true or false. The section in the parentheses is what we're evaluating to either true or false. If the value we evaluate is true, we'll do the section inside the if block. We also looked at else statements which allow us to run another section of code if the condition we're checking is false.

Example:

Console.WriteLine("What percent did you get on your test??"); 
string testResult = Console.ReadLine();
int myScore = Convert.ToInt32(testResult);

if(myScore >= 90)
{
     Console.WriteLine("Awesome! You got an A.");
}
else if (myScore >= 80)
{
     Console.WriteLine("Good job, you got a B.");
}
else
{
     Console.WriteLine("You should keep studying.");
}

In this example, if the user enters an test score greater than or equal to 90, then the section inside the parenthesis evaluates to true, and the first block of code is run.

If we don’t enter the first code block because our score is say, 85, we would then evaluate the 2nd block, (myScore >= 80). This expression would equate to true so we would then write to the console "Good job, you got a B".

If the test score is 79 or less the code inside the else block runs!