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Golang math.J0() Function with Examples

Golang | math.J0() Function: Here, we are going to learn about the J0() function of the math package with its usages, syntax, and examples.
Submitted by IncludeHelp, on September 01, 2021

math.J0()

The J0() function is an inbuilt function of the math package which is used to get the order-zero Bessel function of the first kind.

It accepts a parameter (x) and returns the order-zero Bessel function of the first kind.

Syntax:

func J0(x float64) float64

Parameter(s):

• x : The value to be used to get the order-zero Bessel function of the first kind.

Return Value:

The return type of the J0() function is a float64, it returns the order-zero Bessel function of the first kind.

Special cases:

• J0(±Inf) = 0
  If the parameter is ±Inf, the function returns 0.
• J0(0) = 1
  If the parameter is 0, the function returns 1.
• J0(NaN) = NaN
  If the parameter is NaN, the function returns the same (NaN).

Example 1:

// Golang program to demonstrate the
// example of math.J0() Function

package main

import (
	"fmt"
	"math"
)

func main() {
	fmt.Println(math.J0(1))
	fmt.Println(math.J0(1.5))
	fmt.Println(math.J0(5))

	fmt.Println(math.J0(-1))
	fmt.Println(math.J0(-1.5))
	fmt.Println(math.J0(-5))

	fmt.Println(math.J0(0))
	fmt.Println(math.J0(math.Inf(1)))
	fmt.Println(math.J0(math.Inf(-1)))
	fmt.Println(math.J0(math.NaN()))
}

Output:

0.7651976865579666
0.5118276717359181
-0.1775967713143383
0.7651976865579666
0.5118276717359181
-0.1775967713143383
1
0
0
NaN

Example 2:

// Golang program to demonstrate the
// example of math.J0() Function

package main

import (
	"fmt"
	"math"
)

func main() {
	var x float64
	var J0X float64

	x = 1
	J0X = math.J0(x)
	fmt.Println("J0(", x, ") = ", J0X)

	x = 10.5
	J0X = math.J0(x)
	fmt.Println("J0(", x, ") = ", J0X)

	x = 0
	J0X = math.J0(x)
	fmt.Println("J0(", x, ") = ", J0X)

	x = math.NaN()
	J0X = math.J0(x)
	fmt.Println("J0(", x, ") = ", J0X)

	x = math.Inf(1)
	J0X = math.J0(x)
	fmt.Println("J0(", x, ") = ", J0X)

	x = math.Inf(-1)
	J0X = math.J0(x)
	fmt.Println("J0(", x, ") = ", J0X)
}

Output:

J0( 1 ) =  0.7651976865579666
J0( 10.5 ) =  -0.23664819446234717
J0( 0 ) =  1
J0( NaN ) =  NaN
J0( +Inf ) =  0
J0( -Inf ) =  0

Golang math Package Constants and Functions »

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