1 00:00:00,450 --> 00:00:02,460 In this exercise, you're going to write some 2 00:00:02,460 --> 00:00:05,160 code to create a program that works 3 00:00:05,160 --> 00:00:09,930 out the highest number from a list of numbers. 4 00:00:09,930 --> 00:00:12,870 The scenario is that you work at a school 5 00:00:12,870 --> 00:00:16,290 and your students have come in with all of these scores 6 00:00:16,290 --> 00:00:18,300 and you're going to use Python to figure 7 00:00:18,300 --> 00:00:21,990 out what is the highest score that a given student achieved. 8 00:00:21,990 --> 00:00:24,330 Essentially, what we're doing is we are 9 00:00:24,330 --> 00:00:28,020 replicating the Python max() function 10 00:00:28,020 --> 00:00:30,600 but you must not use the max() function. 11 00:00:30,600 --> 00:00:34,770 Instead, I want you to use a for loop to create 12 00:00:34,770 --> 00:00:36,570 this functionality yourself 13 00:00:36,570 --> 00:00:38,940 and practice the use of for loops. 14 00:00:38,940 --> 00:00:41,070 Take a look at the Example Input 15 00:00:41,070 --> 00:00:44,910 and see what the Example Output is expected to be. 16 00:00:44,910 --> 00:00:48,782 Make sure you match the formatting and the words exactly. 17 00:00:48,782 --> 00:00:51,123 Give this challenge a go now. 18 00:00:58,350 --> 00:01:02,100 So lines two to four have been already written for you 19 00:01:02,100 --> 00:01:05,190 and this just grabs each of the numbers 20 00:01:05,190 --> 00:01:09,273 in the Input and puts them into a list called scores. 21 00:01:10,140 --> 00:01:13,200 Now what you are doing is writing a for loop 22 00:01:13,200 --> 00:01:15,750 in order to track the highest score. 23 00:01:15,750 --> 00:01:17,490 The first thing we're doing is we're creating 24 00:01:17,490 --> 00:01:21,600 a variable called highest_score and setting it to 0. 25 00:01:21,600 --> 00:01:25,080 Next, we write our for loop to loop 26 00:01:25,080 --> 00:01:30,080 through each of the scores in our list of student_scores. 27 00:01:30,690 --> 00:01:34,110 While the loop is running, inside the for loop 28 00:01:34,110 --> 00:01:36,450 we check for a condition, 29 00:01:36,450 --> 00:01:38,370 we use the if statement to check 30 00:01:38,370 --> 00:01:40,985 if the current_score that we are looping 31 00:01:40,985 --> 00:01:45,210 through is greater than the current highest_score. 32 00:01:45,210 --> 00:01:46,800 Now, the first time this loop runs 33 00:01:46,800 --> 00:01:48,500 of course it's going to be greater 34 00:01:49,423 --> 00:01:50,310 because the higher score is 0 35 00:01:50,310 --> 00:01:52,560 so unless somebody had a negative score 36 00:01:52,560 --> 00:01:56,220 then that is going to be the highest score. 37 00:01:56,220 --> 00:02:00,030 Each time we loop through the for loop, we keep checking 38 00:02:00,030 --> 00:02:02,970 against the highest_score variable and making sure 39 00:02:02,970 --> 00:02:06,450 that we store the highest value that we come across. 40 00:02:06,450 --> 00:02:10,229 So if the condition is true, the current score is greater 41 00:02:10,229 --> 00:02:13,710 than the highest score that we previously had, 42 00:02:13,710 --> 00:02:16,757 we set the highest_score to that current score. 43 00:02:16,757 --> 00:02:21,550 And then finally we use a print statement to print 44 00:02:22,471 --> 00:02:23,820 out, "The highest score in the class is:" 45 00:02:24,698 --> 00:02:27,480 and then we insert the highest_score using an f-string. 46 00:02:27,480 --> 00:02:30,420 And because this print statement happens 47 00:02:30,420 --> 00:02:33,442 after the for loop is completed, 48 00:02:33,442 --> 00:02:36,170 notice the indentation of the print statement, 49 00:02:36,170 --> 00:02:37,620 making sure this line is not indented to 50 00:02:37,620 --> 00:02:39,240 inside the for loop, 51 00:02:39,240 --> 00:02:41,610 then this print statement is going to be carried 52 00:02:41,610 --> 00:02:44,340 out once all the scores have been checked 53 00:02:44,340 --> 00:02:46,473 in that list of student scores.