Go - float

• float 
• float32, max value: math.MaxFloat32
• float64, max value: math.MaxFloat64
• float can be printed by fmt package
• %e: exponent
• %f: no exponent
• %g: most compact 
  
• positive & negative infinities (divide by zero): +Inf & -Inf
• 0/0: NaN
• math.Sqrt(-1): NaN
• math.isNaN(value): Check is a variable NaN
• math.NaN(): Return a NaN
• NaN == any value return false