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Get absolute value using math.Abs function

PHPz

Jul 24, 2023 am 11:58 AM

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Use the math.Abs function to get the absolute value

The absolute value is the distance between a number and zero. Regardless of whether it is positive or negative, the absolute value is a non-negative number. In programming, we often need to obtain the absolute value of a number, and the math package in the Go language provides a very convenient function - math.Abs() to obtain the absolute value of a number.

Let’s take a look at how to use the math.Abs function to obtain the absolute value of a number:

package main

import (
    "fmt"
    "math"
)

func main() {
    num := -10.5
    abs := math.Abs(num)
    fmt.Printf("绝对值为：%f
", abs)
}

In the above code, we first imported the fmt and math packages. Then a variable num is defined and assigned a value of -10.5, which represents the absolute value of the number we want to obtain. Next, we call the math.Abs(num) function to get the absolute value of num and save the result in the variable abs. Finally, use the fmt.Printf function to output the results.

Run the above code, we will get the output result: the absolute value is: 10.500000.

Through the math.Abs function, we can easily obtain the absolute value of any number. Of course, this function is not only suitable for floating point numbers, but is also very convenient for processing integers. Let's take a look at an example of an integer:

package main

import (
    "fmt"
    "math"
)

func main() {
    num := -10
    abs := math.Abs(float64(num))
    fmt.Printf("绝对值为：%f
", abs)
}

In this example, we convert the integer -10 to a floating point number, and then call the math.Abs function to get its absolute value. Likewise, we will get the output: the absolute value is: 10.000000.

It should be noted that the parameters of the math.Abs function must be of floating point type or convertible to floating point type. If the parameters passed in do not meet this condition, the compiler will report an error. Therefore, when using the math.Abs function, we need to pay special attention to the type of the parameters and perform type conversion if necessary.

To sum up, the math.Abs function is a very practical function that can easily obtain the absolute value of a number. Whether it is a floating point number or an integer, it can be processed through this function. I hope that through this article, we can better understand and use the math.Abs function.

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