WEBVTT 00:00.080 --> 00:02.200 Hello developers and welcome back. 00:02.240 --> 00:04.600 We finished from basic data types. 00:04.600 --> 00:07.760 Now let's move to the operators in Python. 00:07.920 --> 00:13.160 Before we begin again guys we have those files. 00:13.160 --> 00:16.200 You should upload them to the Google Colab. 00:16.200 --> 00:18.880 You can download them from the resources folder. 00:19.080 --> 00:24.000 And we're going to upload many files later and many notebooks. 00:24.000 --> 00:31.400 So all those notebooks are available to download from the resources folder under each section. 00:31.440 --> 00:37.120 Operators allow you to perform operations on variables and values. 00:37.120 --> 00:40.360 Python divides the operators in many groups. 00:40.600 --> 00:44.720 We have arithmetic assignment comparison. 00:44.840 --> 00:46.920 Logical identity. 00:46.960 --> 00:50.280 Membership, bitwise operators. 00:50.320 --> 00:54.240 Let's start with the most commonly used arithmetic operators. 00:54.560 --> 01:00.960 The addition subtraction addition includes the plus sign. 01:01.000 --> 01:04.120 Subtraction minus sign multiplication. 01:04.160 --> 01:14.120 The asterisk Division forward slash floor division two double forward slash modulus which is the remainder 01:14.320 --> 01:18.360 the percentage and exponentiation which is two asterisks. 01:18.560 --> 01:20.520 Now let's try some calculations. 01:20.520 --> 01:23.560 We have two variables a and b. 01:23.840 --> 01:26.920 A equals ten b equals to three. 01:26.960 --> 01:28.320 We have a lot. 01:28.440 --> 01:31.160 We have all those arithmetic operators. 01:31.400 --> 01:33.400 The first one which is the string. 01:33.560 --> 01:36.280 This will be printed because it's a string. 01:36.520 --> 01:44.560 And here we have the operation a plus b a minus b a times b a over b and so on. 01:44.800 --> 01:56.520 Let's run the cell and we have this output ten plus three equals to 1310 minus three 710 times three 01:56.720 --> 02:01.480 3010 over 33.333. 02:01.800 --> 02:05.680 Those are ordinary and arithmetic operations. 02:05.680 --> 02:16.160 We're going to introduce some of of Operators and operations that are not familiar with in school. 02:16.160 --> 02:18.040 We have the floor division. 02:18.080 --> 02:25.680 Floor division returns the integer part of the division result, discarding any remainder. 02:25.880 --> 02:29.840 So for example here we have ten over three. 02:30.160 --> 02:32.040 It's 3.333. 02:32.360 --> 02:37.080 The integer part is three and the decimal part is this. 02:37.120 --> 02:41.560 We discard this and we eliminate this part. 02:41.560 --> 02:46.800 And we keep the integer part which is three modulus. 02:46.840 --> 02:49.280 I want from you to focus with me. 02:49.280 --> 02:58.120 The percentage symbol is the modulo operator which gives you the remainder after division. 02:58.160 --> 02:59.520 What's happening here? 02:59.600 --> 03:04.280 We have ten over three equals to 3.333. 03:04.320 --> 03:07.320 Integer division is three. 03:07.560 --> 03:14.520 And how many whole times three fits to into ten which is one. 03:14.520 --> 03:25.270 So we have three times 0.333 equals to one, which is the module in another way how to calculate the 03:25.270 --> 03:25.910 remainder. 03:25.910 --> 03:29.390 So ten over three we have 3.333. 03:29.430 --> 03:31.950 This is the arithmetic operator division. 03:31.950 --> 03:34.710 Now in in ten. 03:34.870 --> 03:37.670 How many whole times three. 03:37.950 --> 03:41.430 We have three times three equals to nine. 03:41.630 --> 03:49.230 How many uh how many numbers are uh what I need to get ten from nine. 03:49.230 --> 03:51.470 I need plus one. 03:51.470 --> 03:53.950 So the remainder is one. 03:53.990 --> 03:56.590 We need to get whole numbers. 03:56.590 --> 04:04.030 So in ten we have three times three plus one which is ten. 04:04.070 --> 04:07.790 Again guys the modulus is the remainder. 04:07.830 --> 04:10.390 I'll show you another example. 04:10.430 --> 04:16.070 Print eight modulo two eight modulo two equals to four. 04:16.110 --> 04:27.550 There is no remainder but 8 or 9 Modulo two, we have one because eight eight divided by two equals 04:27.550 --> 04:29.430 two for any remainder. 04:29.470 --> 04:31.910 No, because this is a whole number. 04:31.910 --> 04:33.190 This is an integer. 04:33.390 --> 04:36.510 There's no decimal and the division is complete. 04:36.510 --> 04:47.070 But if nine over two we get 4.5 we can get the modulo in another way using the decimal part multiplied 04:47.070 --> 04:49.190 by the divisor. 04:49.390 --> 04:54.710 So 0.5 times two equals to one which is the remainder. 04:54.750 --> 05:00.070 This remainder plus four times two equals to nine. 05:00.310 --> 05:03.230 This is how we calculate the module. 05:03.270 --> 05:15.070 Another example to understand well brand 15 modulo four run we get three because again the calculator 05:15.230 --> 05:20.190 15 over four equals to 3.75. 05:20.230 --> 05:29.790 If we get the decimal decimal number 0.75 multiplied by the decimal part, we get multiplied by the 05:29.790 --> 05:30.470 divisor. 05:30.710 --> 05:32.110 We get three. 05:32.150 --> 05:37.710 Three plus four times three we get 50. 05:37.750 --> 05:38.270 Okay. 05:38.430 --> 05:44.110 So we multiply the decimal part by the divisor in order to get the remainder. 05:44.150 --> 05:46.950 Or you can simply get the floor division. 05:47.110 --> 05:51.470 When we uh we subtract from the division. 05:51.510 --> 05:54.430 The floor division we get the decimal part. 05:54.470 --> 06:00.590 This decimal part is multiplied by the divisor and we'll get the modulus okay. 06:00.910 --> 06:02.750 Those are very important. 06:02.870 --> 06:06.550 Uh, arithmetic operators operations. 06:06.550 --> 06:15.310 You should know also we have the power a power b a to power B equals to 1000. 06:15.430 --> 06:20.270 So ten to power three equals to 1000. 06:20.310 --> 06:22.750 This is the two asterisks. 06:22.790 --> 06:27.230 Double asterisk mean the exponentiation okay. 06:27.350 --> 06:31.430 Those are the arithmetic operators in Python.