All language subtitles for 005 if statements_en

If statements can use comparisons to control the flow of your code, a comparison is only useful when

it's inside of an IF statement.

So in this lesson, you're going to use statements to control how your code runs.

As usual, we're going to start by creating a new class inside the Section three folder, create a new

file named FLC Java and make sure the class has a main method.

The if statement runs, it's code only if a condition is true.

This is a comparison, but when a comparison is inside of a statement, we call it a condition.

There are two parts to in a statement, the condition which can be true or false and the code inside

which only runs if the condition is true.

So inside of Java, we're going to make an invariable that stores a student's grade into grade is equal

to 65.

Then we're going to make an if statement if and inside the brackets, we're going to read a condition

that checks if a grade is greater than 50.

And inside the if statement, we're going to print.

Great job.

You passed.

This code will only run if the condition is true.

So we're going to run our code.

And it ran the code inside the statement.

That's because the grade 65 is bigger than 50, which makes the condition true.

So the code inside the if statement runs.

Now we're going to change the students grade to 45.

Rewrite our code.

And nothing happens.

The grid is not bigger than 50, which makes the condition false.

So Java skips the code.

When the if condition is false, Jova runs the false statement.

And if a statement looks like this, there is an if statement with a condition and an el statements.

And when the condition is true, Juvy runs the estimates.

And when the condition is false, Java skips the statement and runs the code inside else.

So back in our code, if a student scores under 50, we want the app to say study hard next time, so

we're going to add an else block.

And inside will print study hard next time.

Rerun your code.

And this time the code inside the statement runs, never going to change the grade back to 65.

We run your code once more.

And this time at Prince, great job you passed.

We need to be careful about putting in the right condition, let's assume that if 50 percent warrants

a pass, but our condition checks if the grid is greater than 50.

I'm going to change the grade to 50 and see what happens, rewriting my code.

And that's not good, the condition is false.

So the student fails.

We need to fix our conditions is that the student policies, if they're great, as greater than or equal

to 50.

Let's rerun the code.

And right on the student pass with a D minus.

In this case, the grid is equal to 50, so the condition is true and this runs the code inside the

statements.

In this lesson, you learn to use if statements to control how your code runs.

When the condition is true, Jova runs the if statements.

When the condition is false, Java skips the statement and runs the code inside ls.