# math.Y0() Function in Golang With Examples

Go language provides inbuilt support for basic constants and mathematical functions to perform operations on the numbers with the help of the math package. You can find the order-zero Bessel function of the second kind with the help of Y0() function provided by the math package. So, you need to add a math package in your program with the help of the import keyword to access the Y0() function.

Syntax:

`func Y0(a float64) float64`
• If you pass +Inf in this function like Y0(+Inf), then this function will return 0.
• If you pass 0 in this function like Y0(0), then this function will return -Inf.
• If the value of a<0, then this function will return NaN.
• If you pass NaN in this function like Y0(NaN), then this function will return NaN.

Example 1:

 `// Golang program to illustrate ` `// the use of math.Y0() function ` ` `  `package main ` ` `  `import ( ` `    ``"fmt"` `    ``"math"` `) ` ` `  `// Main function ` `func main() { ` ` `  `    ``// Finding the order-zero Bessel ` `    ``// function of the second kind ` `    ``// Using Y0() function ` `    ``res_1 := math.Y0(-3) ` `    ``res_2 := math.Y0(6) ` `    ``res_3 := math.Y0(math.Inf(1)) ` `    ``res_4 := math.Y0(math.NaN()) ` `    ``res_5 := math.Y0(4.6) ` `    ``res_6 := math.Y0(0) ` ` `  `    ``// Displaying the result ` `    ``fmt.Println(``"Result 1: "``, res_1) ` `    ``fmt.Println(``"Result 2: "``, res_2) ` `    ``fmt.Println(``"Result 3: "``, res_3) ` `    ``fmt.Println(``"Result 4: "``, res_4) ` `    ``fmt.Println(``"Result 5: "``, res_5) ` `    ``fmt.Println(``"Result 6: "``, res_6) ` ` `  `} `

Output:

```Result 1:  NaN
Result 2:  -0.28819468398157916
Result 3:  0
Result 4:  NaN
Result 5:  -0.22345995255364678
Result 6:  -Inf
```

Example 2:

 `// Golang program to illustrate ` `// the use of math.Y0() function ` ` `  `package main ` ` `  `import ( ` `    ``"fmt"` `    ``"math"` `) ` ` `  `// Main function ` `func main() { ` ` `  `    ``// Finding the order-zero Bessel ` `    ``// function of the second kind ` `    ``// Using Y0() function ` `    ``nvalue_1 := math.Y0(5.89) ` `    ``nvalue_2 := math.Y0(5) ` ` `  `    ``// Sum of the given numbers ` `    ``res := nvalue_1 + nvalue_2 ` `    ``fmt.Printf(``"%.3f + %.3f = %.3f"``, ` `            ``nvalue_1, nvalue_2, res) ` ` `  `} `

Output:

`-0.306 + -0.309 = -0.614`

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