Comparison Operators

Quick reference

• 00:04 In this video, I want to talk about comparison operators,
• 00:08 Comparison Operators.
• 00:12 And comparison operators allow you to do pretty much what they sound like.
• 00:17 They allow you to compare two things together.
• 00:19 Later on, we're going to do comparison statements where we can find the answers
• 00:23 to questions, but in order to do those, we need comparison operators.
• 00:27 And they're sort of like math operators.
• 00:29 They're symbols that you can use.
• 00:31 And they are equal to, not equal to,
• 00:36 greater than, less than, greater than or
• 00:43 equal to, and less than or equal to.
• 00:49 You're probably familiar with these from back in grade school math.
• 00:52 Greater than, less than allows you to compare two things.
• 00:55 Is 5 greater than 2?
• 00:59 Is 5 less than 2, right?
• 01:02 Is 5 equal to2?
• 01:03 So we haven't looked at variables yet, and so
• 01:06 this double equal to sign may be a little weird to you.
• 01:09 But in the next video, we'll talk about variables, and I'll explain why
• 01:12 this is normal to have a double equal to sign, instead of just an equal to sign.
• 01:16 But to determine if everything is equal to, we just do the double equal to signs.
• 01:20 Here is one you may not be familiar with, not equal to, this exclamation point in
• 01:25 almost every programming language usually means not, right?
• 01:28 It's just sort of universal computer programming thing, not.
• 01:32 So not equal to.
• 01:34 So let's go ahead and run this.
• 01:36 It's not going to do much at this point, we're just saying is 5 greater than 2?
• 01:40 And I have a hunch that 5 is greater than 2.
• 01:44 And when I run this, we get this true back.
• 01:47 And true is a boolean, usually they're true or false.
• 01:50 And later on when we do comparison statements, we're going to say,
• 01:53 if this thing is true, then do this.
• 01:55 If it's false, do that.
• 01:56 Or if it's true, do this, else, do that.
• 01:59 But for right now,
• 02:00 you can just see it's just out putting on those screen true or false?
• 02:04 Is 5 equal to 2?
• 02:06 I don't think so, false.
• 02:07 So those are comparison operators, a little bit abstract at this point.
• 02:11 They'll become very useful later on, as we start to use comparison statements.
• 02:15 And comparison statements are basically if, else statements.
• 02:18 And they're like a cornerstone of all programming.
• 02:20 You're going to use if, else, comparison statements all the time.
• 02:24 And you'll use these operators in those statements.
• 02:26 So equal to, not equal to, greater than, less than, greater than or equal to,
• 02:30 you're probably familiar with this.
• 02:32 If you don't exactly remember, it means is the number greater than or equal to?
• 02:36 So if we went 5 greater than equal to 2, it is greater than or
• 02:41 equal to, because it's greater than.
• 02:45 It's not equal to, but it's greater than or equal to one or
• 02:48 the other has to be true.
• 02:49 So if we went to 6, 5 is not greater than or equal to 6 so that's false.
• 02:57 If we want 5 greater than equal to 5, that's going to be true and the same for
• 03:01 less than or equal to.
• 03:03 Is it less than or equal to?
• 03:05 So those are comparison operators.
• 03:06 We'll use these a lot throughout the course and
• 03:09 you'll use them forever in your computer programming.
• 03:11 In the next video, we're going to talk about variables.

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