Detailed explanation of Golang integer type conversion: master the essence of data operation

Go language provides a variety of methods to convert integer types, including built-in functions (int(x), uint(x), etc.) and operators (T(x)). Built-in functions convert floating-point numbers to signed and unsigned integers, while operators convert values ​​to specified types, possibly with loss of precision. During the conversion process, attention should be paid to the type size range and the cyclic nature of unsigned integers.

Go language integer type conversion

In the Go language, integer type conversion is a common and important step in data operations operate. This article will delve into the conversion of integer types in the Go language and help you master the essence of data operations.

Built-in functions

• #int(x): Convert float64 or other integer types to int.
• int8(x), int16(x), int32(x), int64(x): Converts a float64 or other integer type to the specified int type.
• uint(x)、uint8(x)、uint16(x)、uint32(x)、 uint64(x): Similarly, convert float64 or other integer types to unsigned integer types.

Operators

In addition to built-in functions, the Go language also provides operators for integer type conversion:

• T(x): Convert x to a value of type T. For example, int(12.34) converts 12.34 to an int.

Practical case

Consider the following Go code:

package main

import "fmt"

func main() {
    var f float64 = 12.34
    var i = int(f)
    fmt.Println(i) // 输出：12
}

In this example, we convert the floating point type f to an integer . The output is 12, indicating that the float64 was successfully converted to int.

Notes

• Precision may be lost during conversion, for example, the decimal part will be discarded when converting float64 to int.
• When converting, attention should be paid to the size range of the integer type to prevent overflow.
• Unsigned integer type will not become negative when overflowing, but will loop to the minimum value.

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