tempconv

{
	fmt.Printf("%g\n", BoilingC-FreezingC) // "100" °C
	boilingF := CToF(BoilingC)
	fmt.Printf("%g\n", boilingF-CToF(FreezingC)) // "180" °F
}
/*
	fmt.Printf("%g\n", boilingF-FreezingC)       // compile error: type mismatch
*/

Output:

100
180

c := FToC(212.0)
fmt.Println(c.String()) // "100°C"
fmt.Printf("%v\n", c)   // "100°C"; no need to call String explicitly
fmt.Printf("%s\n", c)   // "100°C"
fmt.Println(c)          // "100°C"
fmt.Printf("%g\n", c)   // "100"; does not call String
fmt.Println(float64(c)) // "100"; does not call String

Output:

100°C
100°C
100°C
100°C
100
100