which syntax is right for latest ansible

Which syntax is correct for latest ansible?

for example:

sudo: True

or

sudo: yes

Although both are working fine, but which is the recommended way from latest ansible? using True/False or yes/no?

Thanks,

Both are fine. According to YAML they are both booleans. You can see what YAML treats as booleans at http://yaml.org/type/bool.html

Basically it is:

y, Y, yes, Yes, YES, n, N, no, No, NO, true, True, TRUE, false, False, FALSE, on, On, ON, off, Off, OFF