Package rand implements math/rand functions in a concurrent-safe way with a global random source, independent of math/rand's global source.

AbsInt64 returns the absolute value of x.

Alike returns true if a,b is the same exactly (no tolerance) or both NaN.

Close returns true if |a-b| < 1e14.

SoClose is an alias of Tolerance.

Tolerance returns true if |a-b| < e e usually can be set with Epsilon(1e-6).

TruncPrecision returns the float value of x, with case n >= 0 the maximum n bits precision.

VeryClose returns true if |a-b| < 1e16.

Epsilon very small.