Arithmetic-geometric mean/Calculate Pi: Difference between revisions
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Iteration: 4 Diff: 3.05653257536554156111405386493810661E-0010 Pi: 3.14159265358979323846636060270664556 |
Iteration: 4 Diff: 3.05653257536554156111405386493810661E-0010 Pi: 3.14159265358979323846636060270664556 |
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Iteration: 5 Diff: 3.71721942712928151094186846648146566E-0021 Pi: 3.14159265358979323846264338327951628 |
Iteration: 5 Diff: 3.71721942712928151094186846648146566E-0021 Pi: 3.14159265358979323846264338327951628 |
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</pre> |
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=={{header|FutureBasic}}== |
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<syntaxhighlight lang="futurebasic"> |
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double a, c, g, t, p |
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double apprpi |
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short i |
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// Initial values |
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a = 1 |
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g = sqr(0.5) |
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p = 1 |
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t = 0.25 |
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//Iterate just 3 times |
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for i = 1 to 3 |
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c = a |
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a = ( a + g ) / 2 |
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g = sqr( c * g ) |
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c -= a |
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t -= ( p * c^2 ) |
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p *= 2 |
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apprpi = (( a + g )^2) / ( t * 4 ) |
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print "Iteration "i": ", apprpi |
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next |
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print "Actual value:",pi |
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handleevents |
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</syntaxhighlight> |
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{{output}} |
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<pre> |
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Iteration 1: 3.140579250522169 |
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Iteration 2: 3.141592646213543 |
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Iteration 3: 3.141592653589794 |
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Actual value: 3.141592653589793 |
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</pre> |
</pre> |
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