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The Abs
function in the Go programming language is used to find the absolute value of any given number.
Given a positive number, it is returned unchanged, while if a negative number is given as input to the
Abs
function, the number’s positive equivalent is returned.
To use this function, you must import the math
package in your file and access the Abs
function within it using the .
notation (math.Abs
). Here, Abs
is the actual function, while math
is the Go package that stores the definition of this function.
The definition of the Abs
function inside the math
package is:
The Abs
function takes a single argument of type float64 and is the number you want to find the absolute value of.
The Abs
function returns a single value of type float64. This value represents the absolute value of the given argument. So, all returned values are greater or equal to 0.
The above statement has the following two types of arguments that are given to it:
Infinity: Upon sending either positive or negative infinity as an argument to the Abs
function, it returns positive infinity.
NAN: Upon sending a non-numeric argument the Abs
function returns NAN.
The following is a simple example in which we find out the value of 25:
package mainimport ("fmt""math")func main() {x := -25.0y := math.Abs(x)fmt.Print(y)}
Although passing an integer variable as an argument to the Abs
function results in an error, if you directly pass an integer value to it, the value gets automatically typecasted into a float64, and the function works as intended, as displayed by the following example:
package mainimport ("fmt""math")func main() {y := math.Abs(math.Inf(1))fmt.Print(y)}