WEBVTT 00:01.020 --> 00:07.920 Hello, everyone, in this particular session, we will discuss about Boolean values, so the Biton 00:07.920 --> 00:12.310 time for storing true and false values is called booie. 00:12.840 --> 00:17.790 There are two types of boolean values, which is true and false. 00:18.270 --> 00:26.540 So if I write true for the capital T, this means true viol. 00:27.240 --> 00:31.530 If I write false with capital, if this means false. 00:31.920 --> 00:36.270 Now, in case I write this without capitalization. 00:38.510 --> 00:41.200 This will make no sense, this will be something different. 00:42.300 --> 00:51.570 So make sure whenever you're using Boolean values to capitalize D and if for true and false, otherwise 00:51.570 --> 00:52.860 they would lose their meaning. 00:54.770 --> 00:59.030 Now, what we want to know for sure is that. 01:00.730 --> 01:09.400 What is a boolean expression now, a boolean expression is an expression that evaluates a boolean value 01:10.360 --> 01:18.040 and the user equality's operator, which would come back to values and produce boolean value related 01:18.040 --> 01:21.730 to whether those two values are equal or not. 01:22.150 --> 01:23.990 So let us see how we can do it. 01:24.370 --> 01:26.980 So let's say we have two numbers. 01:28.420 --> 01:38.290 Two and seven now I can compare these two numbers so I can use this stubley for the design, which means 01:38.290 --> 01:42.910 equivalent to compare if two is equivalent to seven. 01:43.270 --> 01:51.580 Now, if I evaluate this by running shift into that as it comes out to be false, because two is not 01:51.580 --> 01:56.860 equal to seven now in case I see something like two is less than seven. 01:57.930 --> 02:05.880 Now, this condition is true, so when I will run this, I will get through as a result when I do another 02:05.880 --> 02:09.780 type of comparison where two is greater than seven. 02:10.910 --> 02:21.110 When I evaluated this condition, I get a voice now, a one way of getting through and false values 02:21.110 --> 02:23.920 is by using these companies and nobody does. 02:24.200 --> 02:29.540 So there are different types of comparison operators such as. 02:30.990 --> 02:31.740 Less than. 02:33.810 --> 02:34.590 Greater than. 02:36.060 --> 02:37.380 Less than equal to. 02:38.680 --> 02:39.940 Greater than equal to. 02:41.190 --> 02:47.880 Equivalent to then we have not equal to. 02:49.330 --> 02:55.810 So these are different companies and operators, so I can use these operators to compare to values. 02:57.590 --> 03:04.580 Now, let's see, we have a particular number, say seven, and we want to find out the boolean value 03:04.580 --> 03:04.970 for it. 03:05.630 --> 03:13.070 Now, one thing to know is that any value, which is not a null. 03:14.010 --> 03:19.870 And also, it is not zero would be considered as true. 03:20.340 --> 03:25.430 So in case I go and check the type of. 03:27.720 --> 03:32.900 By converting it into a movie, it is converted into a movie. 03:33.660 --> 03:38.490 So when I find out the bullying type, the bullying counterpart of Zettl. 03:40.480 --> 03:46.360 I get points similarly, if I find out the bullying counterpart for non. 03:47.390 --> 03:57.040 Because none is the language we use in fighting, so it is again for us now, apart from these two values, 03:57.230 --> 04:01.060 if I use any other value, it could be eight. 04:02.320 --> 04:03.560 It could be eight. 04:04.690 --> 04:13.480 Hundred thousand, any higher value, it could be any negative value, all of these values would be 04:13.480 --> 04:14.750 considered as true. 04:17.890 --> 04:28.450 Now, another thing which we can do the use of for this is now there is a typical use that we have for 04:28.450 --> 04:32.460 these boolean values, which is in comparison operators. 04:32.890 --> 04:40.840 So you can use these comparisons to find out the truth value of this. 04:41.140 --> 04:43.930 So what we can do is let us see. 04:43.960 --> 04:45.960 We have a particular condition. 04:46.300 --> 04:47.050 Same. 04:48.010 --> 04:51.130 We have a name, which is. 04:52.250 --> 04:55.880 Munsie And this is a string. 04:58.220 --> 05:04.520 And we have another name, too, which is. 05:05.710 --> 05:09.190 Also, Munsie, but without capital. 05:09.640 --> 05:12.160 Now, if I try to compare this. 05:14.190 --> 05:18.060 So we will say name equivalent to. 05:22.380 --> 05:23.610 Name do. 05:25.120 --> 05:30.620 So this gives us pause because these values are not the same. 05:31.450 --> 05:33.700 Now let us try another thing. 05:33.710 --> 05:38.220 Let us convert this into a lower and lower case. 05:38.590 --> 05:40.660 So I I'm converting this into a. 05:48.860 --> 05:56.780 Now I'm converting this into a lowercase so you can see we got a tool if we do not convert this into 05:56.780 --> 06:00.650 a lowercase and convert this into capitalized. 06:10.030 --> 06:10.810 We get to. 06:12.720 --> 06:20.880 So we can use any kind of operator here, we can remove this, we could have given something like nameless 06:20.880 --> 06:22.380 and equal to name to. 06:24.690 --> 06:28.440 It is giving, shall we give? 06:32.370 --> 06:33.930 Another condition he'll. 06:35.180 --> 06:40.330 So we get calls so we can evaluate different of different logics here. 06:40.670 --> 06:43.100 Now we can do something like. 06:44.170 --> 06:50.510 Two is less than seven and seven is less than 90. 06:51.070 --> 06:56.640 Now, if I'm writing this kind of condition, this is called a chained comparison. 06:57.160 --> 07:00.850 So if I try to evaluate this, this comes out to be true. 07:01.030 --> 07:10.360 Now, what this actually means is I'm trying to do something like two is less than seven and seven is 07:10.600 --> 07:11.830 less than 90. 07:12.220 --> 07:15.090 So here we are using this and operator. 07:15.430 --> 07:20.590 And what this and operator does is it evaluates the first condition. 07:21.700 --> 07:24.240 Then it evaluates the second condition. 07:24.880 --> 07:28.420 And when we use designed operator, this means that. 07:29.590 --> 07:35.710 If this particular condition is true and this particular condition is also true and we are doing in 07:35.890 --> 07:40.030 and of both of these, then the result would we do so? 07:40.450 --> 07:42.120 Let us run this again. 07:42.460 --> 07:44.140 So we are getting a true here. 07:44.530 --> 07:50.800 Now, let us say we meet this particular condition false because two is not greater than seven. 07:51.070 --> 07:53.830 So the result of this one would be a false. 07:55.060 --> 08:04.120 And this is still true, so if we valued this, we get a voice now on the operator, we can use an ampersand 08:04.120 --> 08:09.430 and or we can simply write and it would mean just the same thing. 08:09.860 --> 08:17.050 Now, another option is we can use in our operator and all, but our operator will check both of these 08:17.050 --> 08:17.740 conditions. 08:17.950 --> 08:21.690 And if any one of these conditions is true, it will return to. 08:23.460 --> 08:27.030 Similarly, I can use this type of reader for also. 08:28.190 --> 08:29.450 So it gives a false. 08:30.780 --> 08:37.860 Here, all the do is greater than seven, which is a false statement, and seven greater than nine seven 08:37.860 --> 08:40.620 less than 90 is a true statement. 08:41.880 --> 08:48.370 With this pipe operator, which is used to or it should give desire, that's true, but it is giving 08:48.370 --> 08:57.150 false it as a result because it is creating ambiguity between the list and the then signs present between 08:57.150 --> 08:59.800 seven and seven. 09:00.180 --> 09:04.680 So what we can do here is to make this more clear. 09:05.130 --> 09:07.410 We can use these Brace's. 09:10.860 --> 09:15.900 So once we use these braces and then evaluate, it gives us the results. 09:15.930 --> 09:16.260 Drew. 09:17.780 --> 09:22.070 Or apart from this, we can also do something like this. 09:24.000 --> 09:30.120 Then we can create a chain operator and this chain operator will for the. 09:31.580 --> 09:38.690 Give the result as false, because to greater than seven is a false statement. 09:38.960 --> 09:42.670 So this gives a false while evaluating the complete thing. 09:43.010 --> 09:47.420 But if we want, we can use the other way around, which is with the brackets. 09:47.930 --> 09:49.260 So it works perfectly fine. 09:49.280 --> 09:57.020 So now you can see how we can use different companies and operators to compare different values. 09:57.860 --> 09:58.310 Thank you.