Add code for specimen iGCSE prerelease

.vscode/settings.json

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+{
+    "python.linting.pylintEnabled": true,
+    "python.linting.enabled": true
+}

specimen-igcse-prerelease.py

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+# define lists for all required data
+student_names = []
+test_1_marks = []
+test_2_marks = []
+test_3_marks = []
+total_marks = []
+# define number of students to record data for
+number_of_students = 30
+# define variable for storing total marks gained by all students overall
+sum = 0
+
+# function for prompting user for input, then checking it against conditions
+def getMark(test_number, student_index, max_mark):
+    # keep asking for the mark until a valid mark is entered
+    mark = None
+    while not mark:
+        # ask for mark of given student, for given test number
+        mark = input("%s test %d mark: " % (student_names[student_index], test_number))
+        # check if mark is given and that it's numeric
+        if (mark and mark.isnumeric()):
+            # check mark is in acceptable range of values
+            if (int(mark) < 0 or int(mark) > max_mark):
+                mark = None
+        else:
+            mark = None
+    # return mark
+    return int(mark)
+
+# do this for all students
+for i in range(number_of_students):
+    # retrieve and store student's name
+    student_names.append(input("Name: "))
+
+# do this for all students
+for i in range(number_of_students):
+    # retrieve and store student's test marks
+    # test #1 has a max mark of 20
+    test_1_marks.append(getMark(1, i, 20))
+    # test #2 has a max mark of 25
+    test_2_marks.append(getMark(2, i, 25))
+    # test #3 has a max mark of 35
+    test_3_marks.append(getMark(3, i, 35))
+    # record student's total marks
+    total_marks.append(test_1_marks[i] + test_2_marks[i] + test_3_marks[i])
+    # add student's total marks to sum of all marks gained by all students overall
+    sum += total_marks[-1]
+
+# print each student's total marks
+for i in range(number_of_students):
+    print("%s: %d" % (student_names[i], total_marks[i]))
+
+# print average total for all students
+print("Average total: %.2f" % (sum / 30))