Random number : Math « Development « Ruby

Random number


rand       # => 0.964395196505186
rand       # => 0.390523655919935
rand(100)  # => 81
rand(100)  # => 32

1.	Math functions from the Math module
2.	The Math Object
3.	The Math.exp function returns Euler to the power of x.
4.	Call to the class method sqrt from the Math module
5.	do natural logarithms (base E or Euler) and base-10 logarithms.
6.	Taking Logarithms
7.	Random seeds
8.	Convert the Cartesian point (x,y) to polar (magnitude, angle) coordinates
9.	Convert polar coordinates to Cartesian coordinates