Controlling the precision of floating point number in matlab

Question

I am dividing a number, say

x=2;
y=1/3;
z=x*y;

I expect z to be 0.66666666666667 i.e. 14 numbers after decimal point and the same

Answer 1

you can type in matlab :

digits(10)

it gives you more floating point precision, or also

digits(20)

for example:

 a=1/3
ans = 0.3333
digits(10)
 vpa(a)
 ans= 0.3333333333

search help of matlab by typing doc in command window and then search : digits