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# math.Dim() Function in Golang With Examples

• Last Updated : 01 Apr, 2020

Go language provides inbuilt support for basic constants and mathematical functions to perform operations on the numbers with the help of the math package. Dim() function provided by the math package return the maximum of a-b or 0. So, to access this function you need to add a math package in your program with the help of the import keyword.

Syntax:

` func Dim(a, b float64) float64`
• If you pass Inf in this function like Dim(+Inf, +Inf), then this function will return NaN.
• If you pass -Inf in this function like Dim(-Inf, -Inf), then this function will return NaN.
• If you pass NaN in this function like Dim(a, NaN) or Dim(NaN, b), then this function will return NaN.

Example 1:

 `// Golang program to illustrate the dim function``package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Using Dim() function``    ``res_1 := math.Dim(2, -3)``    ``res_2 := math.Dim(8, -1)``    ``res_3 := math.Dim(-4, -2)`` ` `    ``// Displaying the result``    ``fmt.Printf(``"Result 1: %.1f"``, res_1)``    ``fmt.Printf(``"\nResult 2: %.1f"``, res_2)``    ``fmt.Printf(``"\nResult 3: %.1f"``, res_3)`` ` `}`

Output:

```Result 1: 5.0
Result 2: 9.0
Result 3: 0.0
```

Example 2:

 `// Golang program to illustrate the dim function``package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Using Dim() function``    ``nvalue_1 := math.Dim(3, -1)``    ``nvalue_2 := math.Dim(4, 3)``    ``res := nvalue_1 + nvalue_2``    ``fmt.Printf(``"%.1f + %.1f = %.1f"``,``            ``nvalue_1, nvalue_2, res)`` ` `}`

Output:

`4.0 + 1.0 = 5.0`

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