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1. for i in range(start()),slutt) 

2. 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.

3. Code Block
   language python
   i = 0 while (i<6): print i i++

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   Code Block
   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]))   % Eller: 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]))

    

    

    

    

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   Code Block
   sum = 0 for j in range (0,len(list)): sum+=list(i) print sum   % Eller: sum(x for x in list)

    

    

    

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   Code Block
   def abs_matrix(matrix): for k in range (0,len(matrix)): for t in range (0,len(matrix[k])): if (matrix[k][t]<0) matrix[k][t]*= -1 return matrix mat = [[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]] print(abs_matrix(mat))

    

    

   
   

3. Code Block
   language python
   def max_matrix(matrix): 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] return max mat = [[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]] print(max_matrix(mat))

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