1
00:00:00,430 --> 00:00:05,899
Now we're going to learn about if statements. If statements are a fundamental part of learning

2
00:00:05,899 --> 00:00:12,760
to program. They help a computer make decisions. All computers use if statements, including

3
00:00:12,760 --> 00:00:19,310
my phone. For example, when I unlock my phone, it runs some code that says if I enter the

4
00:00:19,310 --> 00:00:26,210
password correctly, then unlock the phone. Otherwise, it shows an error message.

5
00:00:26,210 --> 00:00:30,880
You can use if statements in your code to make Steve and Alice react to what they see in

6
00:00:30,880 --> 00:00:38,270
the world. For example, if there is a rock in front of them, they can turn left. Or turn

7
00:00:38,270 --> 00:00:45,790
right if they run into a tree. In this case, we don't want to fall into the lava.

8
00:00:45,790 --> 00:00:50,800
It's easy to plan for the lava. We can see it on the screen. But what about the lava that we

9
00:00:50,800 --> 00:00:55,110
can't see under the stone? After we mine the stone, we'll need to check

10
00:00:55,110 --> 00:01:02,110
if there's any lava in there before moving forward. If there is lava there, we want to

11
00:01:02,110 --> 00:01:08,650
place a stone in front of our character before we move forward. That way we can safely move on.

12
00:01:08,650 --> 00:01:15,500
Time for more mining! And remember to use the if statement to watch your step.