

In [ ]:

    
count_up = 0

for i in range(2,17,2):
    count_up -= i   # count_up = count_up - i
    print(i, count_up)



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mylist = [1,6,2,19,-4,27,3]

accumulate = 0

for val in mylist:
    accumulate += val
    print(val, accumulate)



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import numpy as np



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my_array = np.arange(15)
array_2 = np.arange(2,17,1)



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print(my_array, array_2)



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for val1, val2 in np.nditer([my_array, array_2]):
    print(val1, val2, val1+val2)



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x = -3.0

while x < 9.3:
    print(x)
    x += 1.5
    
print("after the loop, x =", x)

what have we learned?

Loops are one way that a computer program does a bunch of things over and over again
In python: for and while loops
For loops - loop over a range, a list, or an array (nditer in numpy)
While loops go until some condition is met
Choose for vs. while for looping depending on circumstance



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