WEBVTT 00:08.660 --> 00:16.240 The logical operators windows partial support for logical operators which are used to combine tests 00:16.560 --> 00:24.010 you then their comparison operator is describing the Presidium lesson and they are described in the 00:24.010 --> 00:25.420 Folarin table. 00:25.420 --> 00:35.950 We have an operator minyon is true if both comparisons are true and on the down or operator Newnan is 00:35.950 --> 00:36.540 true. 00:36.700 --> 00:46.780 If one of or both comparison's is true not operator meaning negation and exclamation mark mean a negation 00:47.050 --> 00:49.880 synonym for NOT operator. 00:49.900 --> 00:57.850 Now you can see some simple very basic examples with looser operators to test whether three is greater 00:57.850 --> 01:03.070 than four times the amount three greater then operator four. 01:03.190 --> 01:10.330 Not surprisingly it returns false to test whether Fyffe is greater than or equal to three times the 01:10.440 --> 01:14.750 amount five greater than greater equals three. 01:14.770 --> 01:18.880 It returns true using that and logical operator. 01:18.880 --> 01:27.280 You can test whether both comparisons are true with the following command three greater than four and 01:27.490 --> 01:29.770 five greater than three. 01:29.800 --> 01:37.870 This returns false since the first test returns false because it is then impossible for both comparisons 01:37.870 --> 01:38.890 to be true. 01:39.040 --> 01:42.390 And you know that overall test is false. 01:42.400 --> 01:52.440 However if you use or logical operator three greater than four or five greater or equal three. 01:52.480 --> 02:00.970 The first test returns false and the right test returns true since only one part of the test needs to 02:00.970 --> 02:04.520 be true for the overall test to succeed. 02:04.540 --> 02:13.150 When you use the OR operator the overall test returns true to view the help file about the logical operator. 02:13.300 --> 02:21.250 Type the following command to the prompt felt about underscore logical underscore operator and some 02:21.250 --> 02:28.720 Vorse about the unit replicators windows powar shell supports the Unirea paraders which you can see 02:28.720 --> 02:29.710 on the screen. 02:29.830 --> 02:39.880 Plus the operator meaning signifies explicitly that a number is a positive number minus signifies that 02:39.880 --> 02:44.290 a number is a negative number plus plus increments. 02:44.410 --> 02:53.830 Well you or wearable and minus minus decrements Well your or variable the decremental and incremental 02:53.850 --> 03:00.240 operators work similarly to the equivalent operators in many other languages. 03:00.280 --> 03:11.020 So to assign a 5 to variable A then incremented type the command variable A equals five variable A plus 03:11.020 --> 03:15.220 plus the value of variable is now 6. 03:15.220 --> 03:22.600 Another example to Sandtown to a variable b and then decremented type these commands. 03:22.630 --> 03:31.370 Variable b equals term variable B minus minus the value or a variable B is now 9. 03:31.540 --> 03:38.320 In some circles you need to be careful whether the incremental decrement operator has come before or 03:38.410 --> 03:40.530 after a variable name. 03:40.550 --> 03:45.280 Saturable a term used in the following command variable a. 03:45.310 --> 03:48.160 Equal Stalham type the following command. 03:48.160 --> 03:58.190 Variable b equals variable A plus plus that assigns the value over variable aid to a variable B. 03:58.330 --> 04:01.980 And after that assignment has taken place. 04:02.020 --> 04:11.350 It is an incremental variable Ed and now the value of variable B is 10 and the value of variable A is 04:11.350 --> 04:12.130 11. 04:12.130 --> 04:18.380 However if you assign the value town to a variable A then type the following command. 04:18.430 --> 04:30.220 See variable C equals plus plus variable a variable A is incremented before the assignment so variable 04:30.280 --> 04:33.880 8 is 11 when Simon takes place. 04:33.910 --> 04:39.940 Therefore the value of both verbal A and variable c is 11.