1 00:00:01,210 --> 00:00:08,830 In this lecture with a great script which will give to use it has the possibility to reject their inputs. 2 00:00:09,150 --> 00:00:15,820 So great script called in a stage star David siobhán. 3 00:00:20,690 --> 00:00:36,200 And on the next line right common I read data from users and make them option to recheck it for data 4 00:00:36,860 --> 00:00:45,130 if data if maybe if provided data are correct 5 00:00:48,980 --> 00:00:54,140 so we can now start gathering some data. 6 00:00:54,300 --> 00:01:02,930 We can ask the user for name so equal and our name 7 00:01:07,200 --> 00:01:18,840 and read user input into a variable called name then we will ask for age and your age and we will read 8 00:01:18,840 --> 00:01:21,670 it into the age. 9 00:01:22,770 --> 00:01:25,800 And then we ask also for the department 10 00:01:29,190 --> 00:01:32,500 and thirdly are the. 11 00:01:33,780 --> 00:01:41,150 Now we can bring to users some summary of what they typed so we can write. 12 00:01:41,640 --> 00:01:43,110 You have and following 13 00:01:56,070 --> 00:02:05,650 so on the next line the bright name followed by output of the whatever name and the same. 14 00:02:05,650 --> 00:02:14,960 We will do for h h followed by output of variable h and the same also for department 15 00:02:17,980 --> 00:02:19,290 or I. 16 00:02:19,290 --> 00:02:22,980 I forgot to read the department of Grabow. 17 00:02:23,380 --> 00:02:30,770 So I will print that variable and I will read it on proper place. 18 00:02:30,940 --> 00:02:33,430 After asking the users department 19 00:02:38,760 --> 00:02:40,980 I can now structure the summary output 20 00:02:44,440 --> 00:02:47,110 and what to do next. 21 00:02:47,110 --> 00:02:49,990 We have displayed to users dead imports. 22 00:02:50,050 --> 00:02:56,230 Now we need to ask them if they agree with data they have entered. 23 00:02:56,680 --> 00:02:57,830 So right. 24 00:02:58,100 --> 00:03:00,420 Is that correct. 25 00:03:00,670 --> 00:03:06,150 And to suggest yes or no possibility is that correct. 26 00:03:11,240 --> 00:03:18,560 Then it does answer into a variable called answer surprisingly. 27 00:03:20,510 --> 00:03:23,940 And now it's time for using a gay structure. 28 00:03:23,960 --> 00:03:32,930 So depending of what ANS-Forth user has chosen that means yes represented by y character are not represented 29 00:03:32,930 --> 00:03:34,670 by any character. 30 00:03:34,670 --> 00:03:42,670 So depending on these Bouvard decide what should happen now we will start with K structures so right 31 00:03:42,690 --> 00:03:49,230 case followed by variable for fall by keyboard in. 32 00:03:49,820 --> 00:03:58,370 So if that variable answer is equals to y in uppercase or which is represented as pipe or it is equal 33 00:03:58,820 --> 00:04:06,900 to y in lowercase we perform some bloke of commands. 34 00:04:07,430 --> 00:04:14,820 Please remember that if you want to run some book of commands for more than one of those as in our case 35 00:04:14,820 --> 00:04:20,630 for uppercase and lowercase VI we don't need to create two or more blocks. 36 00:04:20,790 --> 00:04:28,860 We are herradura using pipe which represents or so if variable bounds for is equal to uppercase of II 37 00:04:28,920 --> 00:04:36,390 or lowercase Why then do the same block of commands for them. 38 00:04:36,390 --> 00:04:42,000 Also don't forget that you need to close the value optional using cried button. 39 00:04:42,340 --> 00:04:52,380 Then if a user has entered why we will save to some file users data so maybe it would be better to just 40 00:04:52,440 --> 00:04:55,590 copy block of code we have already created. 41 00:05:02,510 --> 00:05:06,920 And directed to a file impled not to text. 42 00:05:06,920 --> 00:05:26,410 For example. 43 00:05:26,730 --> 00:05:33,840 And also I will add that to that final few big full signs Ridgeville presence and of these user data 44 00:05:39,490 --> 00:05:48,140 and now I can close this block of commands using Goodbar semicolon and maybe I can put to screen your 45 00:05:48,160 --> 00:05:49,630 data very saved 46 00:05:53,790 --> 00:05:54,100 your 47 00:05:56,950 --> 00:06:08,340 data was saved into employee file. 48 00:06:08,590 --> 00:06:14,820 Now what happens if a user has entered uppercase or lowercase and 49 00:06:18,890 --> 00:06:27,080 before writing commands Please note that I am not using quotation marks around character and this is 50 00:06:27,080 --> 00:06:34,930 not needed as it is only one character which cannot be separated by internal field separator. 51 00:06:34,940 --> 00:06:39,020 My advice for a whole by script is to scroll station Marek's. 52 00:06:39,050 --> 00:06:43,360 If you are working with string which has some space inside. 53 00:06:43,970 --> 00:06:51,420 So if a user entered in a character revealed print nothing was saved. 54 00:06:54,040 --> 00:06:56,140 Around descript again. 55 00:07:02,180 --> 00:07:04,880 If you have an opt 56 00:07:10,340 --> 00:07:19,040 data employee file and finish the section by double semicolon. 57 00:07:19,040 --> 00:07:27,170 Now for a case user will enter something different then why or the character will use asterisk. 58 00:07:27,170 --> 00:07:36,800 But do know why asterisk it is good to mention that gay structure works with wildcards and in the wildcard 59 00:07:36,880 --> 00:07:39,980 as there is a real presence all characters. 60 00:07:40,160 --> 00:07:48,710 So if user didn't answer why or end a character then we will definitely end up in this section because 61 00:07:48,710 --> 00:07:56,090 we are catching all characters here and this is also a reason why we are using asterisk at the bottom 62 00:07:56,330 --> 00:08:03,680 because if we move a static section up for example before section with Vol. II the asterisk section 63 00:08:03,800 --> 00:08:07,180 would be all the better for them and we would never could. 64 00:08:07,190 --> 00:08:15,380 Commands which are inside section we divide value are in sections specified by n character. 65 00:08:15,500 --> 00:08:19,850 So now what would happen if you set or enter to something different. 66 00:08:19,850 --> 00:08:23,180 We will print Verrone answer provided 67 00:08:25,670 --> 00:08:32,280 and we can close the section using double semicolon. 68 00:08:32,300 --> 00:08:41,400 Now we can also close case structure using Issaq keyword so we have basic structure of our script. 69 00:08:41,400 --> 00:08:44,370 But something is missing. 70 00:08:46,110 --> 00:08:52,770 If user will for example ask for yes instead of only y character in that. 71 00:08:52,800 --> 00:08:54,320 Is that correct question. 72 00:08:54,470 --> 00:08:55,920 Descript would reply. 73 00:08:55,920 --> 00:09:00,810 Wrong answer provided and no data will be stored. 74 00:09:00,960 --> 00:09:07,680 User wouldn't need to run the script again so it would be nice to have some option to change user answer 75 00:09:07,910 --> 00:09:10,250 in a case use or provide something different. 76 00:09:10,260 --> 00:09:21,920 And then why or and character and will do that using while loop will keep looping through the code. 77 00:09:22,140 --> 00:09:28,360 If variable called check is equals to zero 78 00:09:34,200 --> 00:09:40,290 now we can specify a body of dialogue using could do and done keyboard 79 00:09:44,190 --> 00:09:52,080 but we should also specify what value has that variable check from the beginning and I will assign zero 80 00:09:52,080 --> 00:09:52,990 to it. 81 00:09:53,520 --> 00:10:00,450 So loop through that code between do and damn if a value of variable check is zero. 82 00:10:00,450 --> 00:10:02,700 Now our Laub would never stop. 83 00:10:02,880 --> 00:10:05,290 As it is 0 and never changing. 84 00:10:05,550 --> 00:10:11,410 So if you want to do a loop to finish we need to change the value of variable check. 85 00:10:11,880 --> 00:10:19,860 So I will invite and and the sections change the value of variable check for example to value 1. 86 00:10:19,860 --> 00:10:22,960 Now if users answer is Y or. 87 00:10:23,010 --> 00:10:26,450 And the value of variable check is not zero. 88 00:10:26,640 --> 00:10:34,150 So that means the loop is finished and won't be repeated if on another case use or first for example 89 00:10:34,150 --> 00:10:41,520 and blah blah he will go to Asterisk section and as there is no changing of value of variable check 90 00:10:42,090 --> 00:10:47,000 then the value of variable check is still 0 and LWB will be continuing with. 91 00:10:47,070 --> 00:10:47,670 Question. 92 00:10:47,670 --> 00:10:49,230 Is that correct. 93 00:10:49,980 --> 00:10:53,380 Now descript is dumb and we can say 94 00:10:58,630 --> 00:11:05,650 ground exec with permission and we can describe no 95 00:11:11,650 --> 00:11:12,650 entry or name. 96 00:11:12,660 --> 00:11:19,980 Peter age 51 Department I-T. 97 00:11:20,490 --> 00:11:21,450 Is that correct. 98 00:11:22,290 --> 00:11:25,070 And Peter says oh I don't have 51. 99 00:11:25,070 --> 00:11:26,080 I'm only 50. 100 00:11:26,100 --> 00:11:27,140 So it is not correct. 101 00:11:27,140 --> 00:11:33,460 So when he Daibes know he got the wrong answer provided as we are taking only the character. 102 00:11:33,480 --> 00:11:42,010 So when he type an he will see nothing was said and the scrip again. 103 00:11:42,320 --> 00:11:44,970 So great it is working perfectly. 104 00:11:45,380 --> 00:12:01,670 So now they're under script again named Peter age 50 Department I.D. and let's say with using Y character 105 00:12:06,340 --> 00:12:09,310 your data were saved in the employee file. 106 00:12:09,310 --> 00:12:12,710 Great except that I have written to him you're dead. 107 00:12:12,760 --> 00:12:14,550 We're saved. 108 00:12:14,900 --> 00:12:18,670 Anyway now let's check that employee file 109 00:12:22,760 --> 00:12:25,540 and we can see that Peter's record over. 110 00:12:25,740 --> 00:12:29,270 Right now we can add another person 111 00:12:34,900 --> 00:12:46,110 Jane age 60 departement age and confident with for example uppercase why and we can check employee file 112 00:12:47,840 --> 00:12:48,350 and grade. 113 00:12:48,380 --> 00:12:49,920 We have two records here. 114 00:12:49,940 --> 00:12:52,950 Screeding works perfectly. 115 00:12:53,170 --> 00:12:55,420 When we go back to scrape 116 00:12:58,160 --> 00:13:03,580 we see that in a while we are starting with line where are we asking users. 117 00:13:03,890 --> 00:13:05,260 Is that correct. 118 00:13:05,360 --> 00:13:07,420 But it is completely up to you. 119 00:13:07,450 --> 00:13:14,440 But to start with it you can for example place the beginning of a while before asking on user name. 120 00:13:14,450 --> 00:13:19,500 So then if it was of reply something different then why or correct that. 121 00:13:19,820 --> 00:13:26,550 Then the user would be forced to enter data as name age and department again.