Data type conversion tutorial in go language

In Go language, data type conversion is usually performed using forced type conversion "type assertion". Common data type conversion methods are as follows: 1. When converting one integer value to another integer value, you can use Forced type conversion; 2. When converting a floating-point value to another floating-point value, you can also use forced type conversion; 3. When converting a string to another data type, you can use related functions in the standard library; 4. To convert a variable of an interface type into a variable of another concrete type, type assertions can be used.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

In Go language, data type conversion is usually performed using forced type conversion (type assertion). The following are several common data type conversion methods:

1. Integer conversion

When converting one integer value to another integer value, you can use forced type Convert. For example, convert a variable x of type int to a variable y of type int64:

var x int = 123
var y int64 = int64(x)  // 将x转换为int64类型，并赋值给y

It should be noted that if the converted result exceeds the value range of the target type, an overflow error will occur.

2. Floating point conversion

When converting one floating point value to another floating point value, you can also use forced type conversion. For example, convert a float32 type variable

String conversion

3. When converting a string to another data type, you can use related functions in the standard library. For example, convert a variable s of type string to a variable x of type int:

var x float32 = 3.14
var y float64 = float64(x)  // 将x转换为float64类型，并赋值给y

It should be noted that if the string cannot be converted to the target type, a parsing error will occur.

Type assertion

4. In the Go language, the interface type is a special type that can store any type of value. If you want to convert a variable of an interface type to a variable of another concrete type, you can use type assertions. For example, convert an interface type variable i to an int type variable x:

import "strconv"

var s string = "123"
x, err := strconv.Atoi(s)  // 将s转换为int类型，并赋值给x

It should be noted that if the value stored in the interface type variable i is not the target type, a runtime error will occur. Therefore, when doing type assertions, it's better to use a form with a second return value, and error handling.

The above are several common data type conversion methods. You need to choose the appropriate method according to the specific situation. When performing data type conversion, be sure to pay attention to data accuracy, range, format and other issues to avoid unnecessary errors.

The above is the detailed content of Data type conversion tutorial in go language. For more information, please follow other related articles on the PHP Chinese website!