Python loops
In this section, we discuss a very important concept: loop or loops. A loop is used to repeat the same task with slightly different input or other factors.
Python loops, if...else conditions
Let's look at a simple loop through all the data items in an array:
>>>import numpy as np >>>cashFlows=np.array([-100,50,40,30]) >>>for cash in cashFlows: ... print(cash) ... -100 50 40 30
One type of data is called a tuple, where we use a pair of parentheses, ()
, to include all input values. One feature of a tuple variable is that we cannot modify its value. This special property could be valuable if some our variables should never be changed.A tuple is different from a dictionary, which stores data with key-value pairs. It is not ordered and it ...
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