Jensen's Device: Difference between revisions
Content added Content deleted
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i = Ref() |
i = Ref() |
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def sum(ref_i, lo, hi, term): |
def sum(ref_i, lo, hi, term): |
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# term is passed by-name, and so is i |
# term is passed by-name, and so is i |
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temp = 0; |
temp = 0; |
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for i in range(lo,hi+1): |
for i in range(lo,hi+1): |
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ref_i.value = i |
ref_i.value = i |
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temp += term() |
temp += term() |
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return |
return temp |
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# note the correspondence between the mathematical notation and the call to sum |
# note the correspondence between the mathematical notation and the call to sum |
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print (sum (i, 1, 100, lambda: 1.0/i.value))</python> |
print (sum (i, 1, 100, lambda: 1.0/i.value))</python> |
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Output: 5.18737751764 |
Output: 5.18737751764 |
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