Go supports the IEEE-754 32-bit and 64-bit floating-point numbers extensively. Let’s see how to use it.
package main
import (
"fmt"
)
func main() {
var f float32
var f2 float64
f = 12.34567890123456
f2 = 12.34567890123456
fmt.Println(f, f2) // prints "12.345679 12.34567890123456"
}
Loss of Precision with Floating Point Numbers
Loss of precision will occur when a 64-bit floating-point number is converted to 32-bit float.
package main
import (
"fmt"
)
func main() {
var f1 float32
var f2 float64
f2 = 1.234567890123
f1 = float32(f2)
fmt.Println(f1) // prints "1.2345679"
}
Complex numbers
Floating-point numbers are used in complex numbers as well. The real and imaginary parts are floats. Complex numbers will be discussed thoroughly in another article.