Oppgave 1 - Teori løkker
for i in range (start,slutt):
print i
Man bruker helst for løkker når man vet hvilke verdier man skal iterere over. Hvis dette er ukjent, for eksempel ved "fortsett så lenge brukerinput ikke er 0", da må man benytte while løkke.
i = 0 while (i<6): print i i++
Oppgave 2 - For-løkke
# printer tekst 20 ganger
for i in range(0,21):
print("Bolton Wanderers!")
Oppgave 3 - While-løkke
from random import randint
ikkesyv = True
while (ikkesyv):
x = randint(0,10)
if (x != 7):
print(x)
else:
ikkesyv = False
Oppgave 4 For-løkker
def neg_or_pos(list): for i in range(0,len(list)): list[i] = (list[i]>=0) return(list) print(neg_or_pos([-4,5,3,9,3,-3,-8,8])) # Alternativt def neg_to_pos(list): for i in range(0,len(list)): if (list[i]>=0): list[i] = 1 else: list[i] = 0 return(list) print(neg_or_pos([-4,5,3,9,3,-3,-8,8]))
sum = 0 for j in range (0,len(list)): sum+=list(i) print sum # Alternativt sum(x for x in list)
Oppgave 5 - Passord
while True:
passord1 = input('Skriv inn ditt passord--> ')
passord2 = input('Skriv inn ditt passord på nytt--> ')
if passord1 == passord2:
print('Passordene er like.')
break
elif (len(passord1) != len(passord2)):
print('Passordene har ulik lengde!')
break
# Sammenligner ASCII-verdi. a har en mindre verdi enn b i ASCII-tabellen. a = 97 og b = 98 f. eks.
if passord1 > passord2:
print('Passord 2 kommer for passord 1 i alfabetet')
else:
print('Passord 1 kommer for passord 2 i alfabetet')
Oppgave 6 - Produkt
from random import randint
while True:
tall1 = randint(1,10)
tall2 = randint(1,10)
produkt = tall1 * tall2
print(produkt)
if produkt > 70:
break
Oppgave 7 - Speedometer
def kmhToMph(kmh):
return kmh / 1.6
for i in range(10,110,10):
print(i,'km/t =',kmhToMph(i),'mph')
Oppgave 8 - Doble for-løkker
matrix = [[1,3,-3,5,23],[23,1,34,13,32],[33,67,64,5,-9],[46,-6,6,64,8],[2,3,19,12,-4]]
matrix = [[1,3,-3,5,23],[23,1,34,13,32],[33,67,64,5,-9],[46,-6,6,64,8],[2,3,19,12,-4]] for k in range (0,len(matrix)): for t in range (0,len(matrix[k])): if (matrix[k][t]<0) matrix[k][t]*= -1 print(matrix)
matrix = [[1,3,-3,5,23],[23,1,34,13,32],[33,67,64,5,-9],[46,-6,6,64,8],[2,3,19,12,-4]] max = -float('Inf') for i in range(0,len(matrix)): for j in range(0,len(matrix[i])): if (matrix[i][j] > max): max = matrix[i][j] print(max)
Oppgave 9 - Badekaret
capacity = 20
currentLevel = 5
while currentLevel < capacity:
currentLevel += 1
print('Current water level is', currentLevel, 'liters.')
print('The bath is full and contains', currentLevel, 'litres.')
Oppgave 10 - Sjakkbrett
def checkColorOfChessboard(x,y):
# we define a chessboard using nested arrays
# b means black, and w means white
board = [['w','b','w','b','w','b','w','b'],
['b','w','b','w','b','w','b','w'],
['w','b','w','b','w','b','w','b'],
['b','w','b','w','b','w','b','w'],
['w','b','w','b','w','b','w','b'],
['b','w','b','w','b','w','b','w'],
['w','b','w','b','w','b','w','b'],
['b','w','b','w','b','w','b','w'],
]
x2 = x - 1
y2 = y - 1
if board[x2][y2] == 'w':
print('Rute',str(x) + ','+ str(y),'er hvit')
else:
print('Rute',str(x) + ','+ str(y),'er svart')
for x in range(1,9):
for y in range(1,9):
checkColorOfChessboard(x,y)
Oppgave 11 - Sum av gangetabellen
sum = 0
for i in range(1,11):
for j in range(1,11):
sum += i * j
print(sum)
Oppgave 12 - Sum av tall
def sumAvTall(n):
sum = 0
for i in range(1,n+1):
sum += i
return sum
n = 0
x = 0
while x < 500:
n += 1
x = sumAvTall(n)
print(n,'is the smallest number whose sum of preceeding numbers and itself is larger than 500')
Oppgave 13 - Stigende sekvenser
import sys
j = 1
for i in range(1,11):
k = 1
while k <= j:
sys.stdout.write(str(k) + ' ')
k += 1
i += 1
j += 1
print