Make a program that adds consecutive numbers range from zero

Make a program that adds consecutive numbers range from zero to a specific number in Matlab. Please post code. Thanks

Solution

I am giving the code to find the consecutive numbers for the given set of numbers.

Try this code to get the consecutive numbers

a(diff(a)==1)

Gives the first value

or

p=find(diff(a)==1)

q=[p;p+1];

a(q) % this gives all the pairs of consecutive numbers