how to stop logical operators?

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kakato
kakato 2013-11-25
评论： kakato 2013-11-25
I need to create a program that calculates square root of 2 using loop. starting with t=0.5. I need to stop cycle (and print iteration number i) when the t(i) is same for approximation : if abs((t(i)-t(i+1)))<10^-6. Can anyone help me? please please please :)
t(1)=0.5
for i=1:10
t(i+1)=1/2*(t(i)+2/t(i));
if abs((t(i)-t(i+1)))<10^-6
[ i, t(i)]
else
end
end

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回答（2 个）

Walter Roberson
Walter Roberson 2013-11-25
if condition
break
end
  3 个评论
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Aviram Gelblum
Aviram Gelblum 2013-11-25
t(1)=0.5;
t(2)=1/2*(t(1)+2/t(1));
i=1;
while abs((t(i)-t(i+1)))>=10^-6
t(i+2)=1/2*(t(i+1)+2/t(i+1));
i=i+1;
end
t=t(end-1);

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Laurent
Laurent 2013-11-25
编辑：Laurent 2013-11-25
Instead of a for-loop, you can use a while loop. Something like this:
while abs((t(i)-t(i-1)))>10^-6
your calculations
i=i+1;
end

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