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# Finding Floor Value of a Given Number in Golang

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 are allowed to find the greatest integer value less than or equal to the specified number with the help of Floor() 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 Floor() function.

Syntax:

`func Floor(y float64) float64`
• If you pass +Inf or -Inf in this function, then this function will return +Inf or -Inf.
• If you pass +0 or -0 in this function, then this function will return +0 or -0.
• If you pass NaN in this function, then this function will return NaN.

Example 1:

 `// Golang program to find out the floor value ` ` `  `package main ` ` `  `import ( ` `    ``"fmt"` `    ``"math"` `) ` ` `  `// Main function ` `func main() { ` ` `  `    ``// Finding the greatest integer value  ` `    ``// less than or equal to the ` `    ``// specified number ` `    ``// Using Floor() function ` `    ``res_1 := math.Floor(4.7) ` `    ``res_2 := math.Floor(-8.976) ` `    ``res_3 := math.Floor(0.687997) ` ` `  `    ``// 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: 4.0
Result 2: -9.0
Result 3: 0.0
```

Example 2:

 `// Golang program to find out the floor value ` ` `  `package main ` ` `  `import ( ` `    ``"fmt"` `    ``"math"` `) ` ` `  `// Main function ` `func main() { ` ` `  `    ``// Finding the greatest integer value ` `    ``// less than or equal to the  ` `    ``// specified number ` `    ``// Using Floor() function ` `    ``nvalue_1 := 3.4556775 ` `    ``nvalue_2 := 23.564646 ` `    ``res := nvalue_1 + nvalue_2 ` `    ``fmt.Printf(``"%.5f + %.5f = %.5f"``, ` `             ``nvalue_1, nvalue_2, res) ` `     `  `    ``fmt.Println(``"\nGreatest integer value: "``, ` `                             ``math.Floor(res)) ` ` `  `} `

Output:

```3.45568 + 23.56465 = 27.02032
Greatest integer value:  27
```

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