WEBVTT 00:00.080 --> 00:01.080 Welcome back. 00:01.120 --> 00:03.560 We learned about arithmetic operators. 00:03.600 --> 00:08.280 Now let's move to the second type of operators called comparison. 00:08.320 --> 00:13.840 Those operators return a boolean either true or false. 00:13.960 --> 00:17.840 For example we have this double equal sign. 00:17.880 --> 00:21.000 Equal meaning equals two five. 00:21.040 --> 00:22.600 Is it equal to five? 00:22.640 --> 00:23.400 Yes. 00:23.440 --> 00:25.200 The result would be true. 00:25.240 --> 00:32.960 We have another comparison operator which is this exclamation mark followed by the equals sign. 00:33.000 --> 00:35.920 This means that it's not equal to. 00:35.960 --> 00:36.640 So five. 00:36.680 --> 00:38.960 Is it not equal to three? 00:39.000 --> 00:39.640 Yes. 00:39.960 --> 00:40.960 So it's true. 00:41.080 --> 00:43.440 This is the greater than sign. 00:43.480 --> 00:43.840 Five. 00:43.880 --> 00:44.920 Greater than three. 00:44.960 --> 00:45.520 Yes. 00:45.640 --> 00:46.480 It will return. 00:46.480 --> 00:46.920 True. 00:46.960 --> 00:48.560 The less than five. 00:48.600 --> 00:49.760 Less than three. 00:49.960 --> 00:51.760 It returns false. 00:51.800 --> 00:54.320 Greater than or equal five. 00:54.360 --> 00:56.400 Greater than or equal to five. 00:56.520 --> 00:57.200 Yes. 00:57.200 --> 00:57.760 True. 00:57.800 --> 00:58.520 Return. 00:58.520 --> 00:58.960 True. 00:59.120 --> 01:01.640 And less than or equal five. 01:01.680 --> 01:03.360 Less than or equal to six. 01:03.360 --> 01:04.880 It returns true. 01:04.920 --> 01:08.090 We have two variables x and y. 01:08.130 --> 01:11.450 X equals to ten, y equals to 20. 01:11.530 --> 01:14.930 Let's run this code and here we go. 01:15.090 --> 01:19.210 For the first operation x is equal to y. 01:19.370 --> 01:23.490 Know it returns false x doesn't equal to y. 01:23.690 --> 01:25.570 Yes it returns true. 01:25.730 --> 01:29.850 This is true x greater than y ten. 01:30.010 --> 01:31.210 Greater than 20. 01:31.250 --> 01:34.610 No it returns false x less than y. 01:34.930 --> 01:36.530 It returns true. 01:36.770 --> 01:41.490 So those are the comparison operators. 01:41.610 --> 01:44.650 Let's move to the logical operators. 01:44.650 --> 01:45.450 We have. 01:45.690 --> 01:50.330 Uh, we have and or and not operators. 01:50.570 --> 01:55.210 Those operators are used to combine conditional statements. 01:55.210 --> 02:05.370 For example we have and meaning and x greater than five and y greater less than 30. 02:05.490 --> 02:06.130 Yes. 02:06.250 --> 02:11.290 True or x greater than five or y less than ten. 02:11.330 --> 02:17.180 It returns true not reverses, not x greater than y. 02:17.340 --> 02:18.540 It returns false. 02:18.740 --> 02:28.020 And for better understanding, let me show you again guys, that x equals to ten and y equals to 20. 02:28.220 --> 02:38.580 Copy it and let me paste it here again guys let me run this cell x equal to ten y equals to 20. 02:38.580 --> 02:39.340 Print. 02:39.380 --> 02:42.380 We have this expression. 02:42.380 --> 02:46.140 It's of two parts x greater than five. 02:46.380 --> 02:49.740 Yes it is true y less than 30. 02:49.900 --> 02:50.740 Yes. 02:50.940 --> 02:55.060 So true and true equals true. 02:55.340 --> 02:56.940 So this true. 02:57.180 --> 03:04.260 And this end operator evaluate between a true and a true it returns true. 03:04.260 --> 03:07.500 Another example x greater than five. 03:07.660 --> 03:11.340 Yes it's true or y less than 20. 03:11.380 --> 03:16.700 No it's false but true or false returns true. 03:16.700 --> 03:18.140 So this is the logic. 03:18.340 --> 03:20.380 This is the logical operators. 03:20.620 --> 03:21.740 True and true. 03:21.900 --> 03:22.460 Returns. 03:22.460 --> 03:22.860 True. 03:23.100 --> 03:25.260 True or false. 03:25.300 --> 03:26.900 Returns true. 03:26.940 --> 03:28.180 True or true. 03:28.220 --> 03:29.660 Returns true. 03:29.780 --> 03:31.980 Not x greater than five. 03:32.020 --> 03:33.620 X greater than five. 03:33.860 --> 03:35.900 It's true, not the true. 03:36.140 --> 03:37.740 It returns false. 03:37.740 --> 03:41.100 So it reverses the result. 03:41.100 --> 03:46.220 So and returns true if both statements are true. 03:46.420 --> 03:57.340 So if this side and this side both statements are true, it returns true x greater than five and y less 03:57.340 --> 03:58.100 than ten. 03:58.300 --> 04:07.100 The or operator returns true if one of the statements is true, not reverses the result. 04:07.140 --> 04:10.580 Returns false if the result is true. 04:10.780 --> 04:13.820 So if it is true, it returns false. 04:13.860 --> 04:21.100 Okay, so those are the basic operators that we're going to use in our course. 04:21.100 --> 04:27.220 There are a lot of other operators but we are interested in those operators.