TLang.Float / Double

Parsing and Conversion

      let f  = Float.parse("3.14")      // String → Float
      let s  = Float.toString(3.14)     // Float → String
      let fi = Float.fromInt(42)        // Int → Float
      let i  = Float.toInt(3.9)         // Float → Int (truncated, not rounded)
    

Rounding

      let r = Float.round(3.7)     // 4.0
      let f = Float.floor(3.7)     // 3.0
      let c = Float.ceil(3.2)      // 4.0
    

Numeric Operations

      let a  = Float.abs(-2.5)            // 2.5
      let mn = Float.min(1.5, 2.5)        // 1.5
      let mx = Float.max(1.5, 2.5)        // 2.5
      let sq = Float.sqrt(16.0)           // 4.0
      let pw = Float.pow(2.0, 10.0)       // 1024.0
    

Precise Arithmetic Functions

For contexts where operator precedence could cause ambiguity, named arithmetic functions are available.

      let sum  = Float.add(0.1, 0.2)
      let diff = Float.sub(1.0, 0.3)
      let prod = Float.mul(2.5, 4.0)
      let quot = Float.div(10.0, 3.0)
    

Testing Values

      let nan = Float.isNaN(0.0 / 0.0)          // true
      let inf = Float.isInfinite(1.0 / 0.0)     // true
    

Constants

      let pi  = Float.pi()          // 3.141592653589793
      let e   = Float.e()           // 2.718281828459045
      let inf = Float.infinity()    // positive infinity
      let nan = Float.nan()         // NaN
    

Double

Double has the same API. Use Double when the intent is to emphasise double precision.

      use TLang.Double

      let pi   = Double.pi()
      let root = Double.sqrt(2.0)
      let r    = Double.round(Double.pi())    // 3.0
    

Example — Percentage Formatter

      use TLang.Float
      use TLang.Int

      func percent(value: Float, total: Float): String {
          let ratio = Float.div(value, total)
          let pct   = Float.mul(ratio, 100.0)
          let pct   = Float.round(pct)
          return Int.toString(Float.toInt(pct)) + "%"
      }

      func main(): String {
          let p = percent(37.0, 100.0)
          Terminal.println(p)    // "37%"
          return "done"
      }