convert double to string!

I want convert double number like 0.222833 to string but when i using num2str the number convert to '0.22283' and sixth digit of number is removed ,can u help me to convert it to string?

Answer 1

[Azzi Abdelmalek]

a=0.222833
a=sprintf('%.6f',a)

[fatemeh]

thank you very much

[Azzi Abdelmalek]

%or

b=sprintf('%.20f',a);
idx=regexp(b,'0+','start');
b(idx(end):end)=[]