06-10 loops and Lists

Given the string, s, and the list, lst, assign True to the variable contains if every string in lst appears in s (and False otherwise). Thus, given the string "Hello world" and the list ["H", "wor", "o w"], contains would be assigned True.

for e in lst: [Tab Key]if e in s: [Tab Key][Tab Key]contains = True [Tab Key][Tab Key]break [Tab Key]contains = False

In the following sequence, each number (except the first two) is the sum of the previous two numbers: 0, 1, 1, 2, 3, 5, 8, 13, .... This sequence is known as the Fibonacci sequence. We speak of the i'th element of the sequence (starting at 0)-- thus the 0th element is 0, the 1st element is 1, the 2nd element is 1, the 3rd element is 2 and so on. Given the positive integer n, assign the nth value of the fibonacci sequence to the variable result. For example, if n contains the value 8 then result would contain 21.

if n <= 1: [Tab Key]result = n else: [Tab Key]count = 2 [Tab Key]i = 1 [Tab Key]lastI = 0 [Tab Key]while count <= n: [Tab Key][Tab Key]lastI, i = i, lastI + i [Tab Key][Tab Key]count += 1 [Tab Key]result = i

Given the list lst of positive integers, assign the largest duplicated element to the variable max_dup. If the list contains no duplicates, assign -1 to max_dup.

max_dup = -1 for i in range(len(lst)): [Tab Key]if lst[i] in lst[i+1:] and max_dup < lst[i]: [Tab Key][Tab Key]max_dup = lst[i]

A triangular number is a number that is the sum of the integers from 1 to some integer n. Thus 1 is a triangular number because it is the sum of the integers from 1 to 1; 6 is a triangular number because 1+2+3=6. Given the non-negative integer n, create a list of the first n triangular numbers. Thus if n was 5, the list would be: [1, 3, 6, 10, 15]. Assign the list to the variable triangulars.

triangular = [] t = 0 for i in range(1, n+1): [Tab Key]t += i [Tab Key]triangulars.append(t)

A triangular number is a number that is the sum of the integers from 1 to some integer n. Thus 1 is a triangular number because it is the sum of the integers from 1 to 1; 6 is a triangular number because 1+2+3=6. Given the non-negative integers m and n (with m < n), create a list of the triangular numbers between (and including) m and n. Thus if m is 3 and n is 20, the list would be: [3, 6, 10, 15]. Assign the list to the variable triangulars.

triangulars = [] t = 0 i = 1 while t+i <= n: [Tab Key]t += i [Tab Key]if t >= m: triangulars.append(t) [Tab Key]i += 1