Primality by trial division: Difference between revisions
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m (→{{header|Tiny BASIC}}: -fix) |
m (→{{header|Phix}}: added syntax colouring the hard way, made runnable and added output) |
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=={{header|Phix}}== |
=={{header|Phix}}== |
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<!--<lang Phix>(phixonline)--> |
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<lang Phix>function is_prime_by_trial_division(integer n) |
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<span style="color: #008080;">function</span> <span style="color: #000000;">is_prime_by_trial_division</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">)</span> |
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if n<2 then return 0 end if |
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<span style="color: #008080;">if</span> <span style="color: #000000;">n</span><span style="color: #0000FF;"><</span><span style="color: #000000;">2</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">0</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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if n=2 then return 1 end if |
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<span style="color: #008080;">if</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">=</span><span style="color: #000000;">2</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">1</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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if remainder(n,2)=0 then return 0 end if |
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<span style="color: #008080;">if</span> <span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span><span style="color: #000000;">2</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">0</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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for i=3 to floor(sqrt(n)) by 2 do |
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<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">3</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">floor</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sqrt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">))</span> <span style="color: #008080;">by</span> <span style="color: #000000;">2</span> <span style="color: #008080;">do</span> |
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if remainder(n,i)=0 then |
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<span style="color: #008080;">if</span> <span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> |
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return 0 |
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<span style="color: #008080;">return</span> <span style="color: #000000;">0</span> |
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end if |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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end for |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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return 1 |
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<span style="color: #008080;">return</span> <span style="color: #000000;">1</span> |
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end function</lang> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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<span style="color: #0000FF;">?</span><span style="color: #7060A8;">filter</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">tagset</span><span style="color: #0000FF;">(</span><span style="color: #000000;">32</span><span style="color: #0000FF;">),</span><span style="color: #000000;">is_prime_by_trial_division</span><span style="color: #0000FF;">)</span> |
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<!--</lang>--> |
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{{out}} |
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<pre> |
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{2,3,5,7,11,13,17,19,23,29,31} |
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</pre> |
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=={{header|PHP}}== |
=={{header|PHP}}== |
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