CSC111 Exercises with For-Loops: Repeating things

--D. Thiebaut (talk) 10:17, 28 February 2014 (EST)

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Exercise 1

Given the array sound

sound = [ 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 9, 1, 1, 0, 0]

write a program that will ask the user for a number and will indicate if this number is in the array or not

Exercise 2

Given the array words

words = [ "hello", "there!", "there", "will", "be", "a", "big", "snow", "storm", "on", "Monday" ]

write a program that will ask the user for a word and will indicate if this word is in the array or not

Exercise 3

Same as Exercise 1, but this time the program returns the number of times the user's choice appears in the array.

Exercise 4

Given the array sound, and an integer input by the user, your program will return the location of the first occurrence of the user's number.

Exercise 5

Given the array sound, and an integer input by the user, your program will return the location of the last occurrence of the user's number.

Possible Solution

sound = [1, 10, 3, 10, 3, 10, 2 ]

x = int( input( "Enter an integer: " ) )

pos = -1
for i in range( len( sound )-1, -1, -1 ):
   if sound[i] == x:
       pos = 1
       break

if pos != -1:
   print( "Found %d at position %d" % (x, pos ) )
else:
   print( "%d not found!" %x )