The Go programming language uses the **`Ilogb`** function to find the binary exponent of a `float64` number. It differs from the `Logb` function in its return type, as `Ilogb` returns the binary exponent as an integer instead of a `float64`.

To use this function, you must import the `math` package in your file and access the `Ilogb` function within it using the `.` notation (`math.Ilogb`). Here, `Ilogb` is the actual function, while `math` is the Go package that stores the definition of this function.

# Function definition

The definition of the `Ilogb` function inside the `math` package is:


# Parameters
The `Ilogb` function takes a single argument of type `float64`.



# Return value

The `Ilogb` function returns a single value of type int that represents the binary exponent of the input argument.

> The function returns the maximum number that can be stored as an Int32 variable when the input argument has an infinite, undefined, or zero value. 




# Examples

Following is a simple example that generates the binary exponent value of 5:

package main

import (
	"fmt"
	"math"
)

func main() {
	x := 5.0
	y := math.Ilogb(x)
	fmt.Print(x, "'s binary exponent value is ", y)
}

The following example shows how the `Ilogb` function handles infinite values.

> The `Inf` function returns an infinite value with a sign matching the sign of the argument that it is given.

package main

import (
	"fmt"
	"math"
)

func main() {
	x := math.Inf(-1)
	y := math.Ilogb(x)
	fmt.Print(x, "'s binary exponent value is ", y)

	fmt.Print( "\n")


	a := math.Inf(1)
	b := math.Ilogb(a)
	fmt.Print(a, "'s binary exponent value is ", b)

}

The following examples show how undefined values are handled by the `Ilogb` function.

> We use the `NaN` function to generate the undefined numeric values to test.

package main

import (
	"fmt"
	"math"
)

func main() {
	x := math.NaN()
	y := math.Ilogb(x)
	fmt.Print(x, "'s binary exponent value is ", y)
}

What is the Ilogb function in Golang?

Ilogb in Go's math package returns the binary exponent of a float64 as an integer.