initial commit

constants/constants.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"math"
+)
+
+//const declares a constant value.
+const s string = "constant"
+
+func main(){
+	fmt.Println(s)
+	// A const statement can appear anywhere a var statement can.
+	const n = 500000000
+	// Constant expressions perform arithmetic with arbitrary precision.
+	const d = 3e20 / n
+	// A numeric constant has no type until it’s given one, such as by an explicit conversion.
+	fmt.Println(int64(d))
+	// A number can be given a type by using it
+	// in a context that requires one, such
+	// as a variable assignment or function call.
+	// For example, here math.Sin expects a float64.
+	fmt.Println(math.Sin(n))
+}