Built-in functions of golang functions

Built-in functions are predefined functions in the core of Go that make it easy to perform common tasks such as type conversions, string manipulation, and mathematical operations. Specifically, they include: Type conversion functions that allow conversion between different types, such as string, int, and float64. String processing function supports operations such as obtaining length, extracting substrings, and case conversion. Mathematical functions that calculate absolute values, maximum values, minimum values, and rounding. These functions simplify the development process by providing an efficient and standardized way to perform various operations to improve code quality and efficiency.

Built-in functions in Go

Built-in functions are part of the Go core and are used to perform common tasks such as type conversions , string processing and mathematical operations. They provide convenient ways to accomplish specific operations easily, making your program more efficient.

Type conversion

Function	Description
string	Convert other types (such as int, float64) to string
int	Convert other types (such as string, float64) to integers
float64	Convert other types (such as int, string) to floating point numbers

String processing

Return part of the stringConvert the string to uppercaseConvert a string to lowercase

Function	Description
len	Return the length of the string
##substr
ToUpper
ToLower

Mathematical operations

##Functionmath.Absmath.Maxmath.Minmath.Round

Description
Returns a number Absolute value
Returns the maximum of two numbers
Returns the minimum of two numbers
will Numbers are rounded to the nearest integer

Practical example

The following code example demonstrates the use of the built-in function:

package main

import "fmt"
import "math"

func main() {
  // 类型转换
  s := string(42)
  x := int(math.Pi)
  f := float64(true)

  // 字符串处理
  str := "Hello, world!"
  fmt.Println(len(str)) // 13
  fmt.Println(substr(str, 0, 5)) // "Hello"

  // 数学运算
  fmt.Println(math.Abs(-5)) // 5
  fmt.Println(math.Max(3, 7)) // 7
  fmt.Println(math.Round(f)) // 1.0
}

Built-in functions are powerful tools in Go programming, simplifying the development process by providing standard and efficient ways to perform common tasks. Understanding and using them skillfully can improve the quality and efficiency of your program.

The above is the detailed content of Built-in functions of golang functions. For more information, please follow other related articles on the PHP Chinese website!