Please explain what does 0.0_p2 and 1.0_p2 mean here.
integer , parameter :: sp = kind(1.0)
integer , parameter :: p2 = selected_real_kind(2*precision(1.0_sp))
real(p2), parameter :: zero = 0.0_p2, &
one = 1.0_p2
What does 0.0_p2 mean?
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The term
is the real number
0.0with kindp2. The snippet you've posted tells us thatp2denotes the kind returned by the expressionso
p2is probably the same asdouble precision, and also probably a 64-bit real number.