WEBVTT 00:00.080 --> 00:00.380 Okay. 00:00.380 --> 00:02.960 So let's talk about the numbers in PHP. 00:02.960 --> 00:05.990 So we've already covered that plenty of times. 00:05.990 --> 00:07.460 But let's have a reminder. 00:07.460 --> 00:09.050 So we have integers. 00:09.050 --> 00:15.200 And we've got floating point numbers like this p number right here. 00:15.380 --> 00:25.490 Now you can cast strings to integers by using the int operator like that. 00:25.490 --> 00:30.740 And also you can cast floating point numbers to integers. 00:34.520 --> 00:36.170 Like this. 00:37.970 --> 00:41.690 Now let's all vardump this to see what are the values. 00:41.690 --> 00:43.430 So integer and float. 00:43.550 --> 00:49.010 This should be obvious and string to integer and float to integer. 00:49.040 --> 00:50.690 Let's see what's the effect. 00:50.690 --> 00:53.750 Let's run numbers. 00:53.990 --> 00:54.350 PHP. 00:54.440 --> 00:55.490 There it is. 00:56.420 --> 01:00.080 So next up there are some arithmetic Relations. 01:00.080 --> 01:06.050 So I don't think there is much point in showing them because they are pretty basic. 01:06.170 --> 01:16.160 Like you've got addition, subtraction, you can multiply or divide values, but an interesting one 01:16.160 --> 01:21.470 is modulus, which is the remainder of a division by a number. 01:21.470 --> 01:25.940 And this is often used to find odd and even numbers. 01:26.120 --> 01:32.210 Let's say you've got seven and you just do modulo by two. 01:32.450 --> 01:40.580 And if the remainder is one, this means it is an odd number, and if the remainder is zero, this means 01:40.580 --> 01:42.590 it is an even number. 01:46.040 --> 01:46.460 Okay. 01:46.460 --> 01:54.050 And something that's really interesting and useful with numbers is all the mathematical operations. 01:54.170 --> 01:57.620 So for example rounding of the numbers. 01:57.620 --> 02:05.240 So I promised you that before, and we haven't really done that other than actually casting a float 02:05.270 --> 02:11.780 number to an integer, which in this case 399 always casts to three. 02:11.810 --> 02:18.410 That might not be what you really want, especially if you, let's say, want to be fair. 02:18.410 --> 02:28.910 And let's assume this is an average rating of a book or movie, or someone grades 399 is really close 02:28.910 --> 02:34.730 to four, so it should be rounded up to four, not rounded down to three. 02:34.730 --> 02:39.410 And there are different functions that just do it differently. 02:39.440 --> 02:44.180 So first round with three seven. 02:44.300 --> 02:48.800 And then let's do round with 3.4. 02:49.820 --> 02:51.200 Let's run this. 02:51.440 --> 02:55.790 So as you see the 3.7 rounds to four. 02:55.790 --> 03:01.160 But if it is Below three and a half, it rounds to three. 03:01.460 --> 03:03.530 So this is how round works. 03:03.530 --> 03:07.820 But there also is a floor function. 03:07.850 --> 03:10.790 Let's run it for 3.8. 03:10.820 --> 03:14.570 And it will also always round down. 03:14.900 --> 03:17.720 Then there is a scale function. 03:19.280 --> 03:21.410 Let's run it on 3.1. 03:21.440 --> 03:24.620 This would always round up. 03:26.990 --> 03:31.460 Next up there are some functions like minimum or maximum. 03:32.030 --> 03:42.290 So it basically will find either the minimum or the maximum functions from those given. 03:42.320 --> 03:47.960 This is often very useful especially for algorithms as you see. 03:47.990 --> 03:49.100 Minimum is one. 03:49.130 --> 03:52.880 Maximum is seven which makes perfect sense. 03:53.210 --> 03:58.550 Then randomizing and generating a random number. 03:58.550 --> 04:06.050 So this would give you a random number every single time we've got two, then we've got five, etc. 04:06.050 --> 04:10.700 and an absolute function abs. 04:10.730 --> 04:13.730 And this just gives you an absolute value of a number. 04:13.730 --> 04:17.210 So in case of minus five this would be five. 04:17.930 --> 04:21.350 Then there is the number formatting. 04:21.350 --> 04:31.190 So let's come up with a number maybe something like this. 04:34.910 --> 04:40.790 And then you might want to format it in a specific way. 04:40.790 --> 04:48.500 So there is the number format function to which you can pass the number. 04:50.330 --> 04:53.420 Then you can choose how many decimals you would like. 04:53.420 --> 04:55.400 So it defaults to zero. 04:55.730 --> 04:59.660 So maybe if this has more I can just select that. 04:59.660 --> 05:01.850 I'd like two decimals. 05:01.850 --> 05:11.540 And this really makes sense for the currencies and all the numbers that needs to have at most two decimals, 05:11.540 --> 05:17.120 because more decimals would make zero sense for such numbers. 05:17.240 --> 05:20.690 And then you have decimal separator. 05:20.690 --> 05:24.560 By default it's dot but it differs across countries. 05:24.560 --> 05:27.920 So you might use a comma. 05:28.340 --> 05:32.330 And then the final one is thousands separator. 05:32.330 --> 05:37.100 So there are countries which don't use any thousands separator. 05:37.100 --> 05:39.230 And there are countries which do. 05:40.550 --> 05:44.600 So maybe let's use a dot for the floating point number separation. 05:44.600 --> 05:45.740 And. 05:48.140 --> 05:53.960 This is how this number right here was formatted.