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What are the basic grammars of Go language?
Go language is an open source programming language developed by Google to improve program development efficiency. Its syntax is similar to the C language, but more powerful and easier to use. Before learning the Go language, you must understand its basic syntax. In this article, we will introduce the basic syntax of the Go language to help novices get started and learn quickly.
Variables are containers for storing data in a program. In the Go language, variables can be various types of data, including integers, floating point numbers, strings, Boolean values, etc. When declaring a variable, you need to specify the type of the variable. For example, the following code declares an integer variable named a and initializes its value to 10.
var a int = 10
You can also use simplified writing, as follows:
a := 10
You must first use the variable Declare it. If there is no initialization value, it defaults to 0 or an empty string.
In the Go language, there are many data types, including integers, floating point numbers, Boolean values, strings, characters, etc. Each data type has its specific purpose and usage. The following are some commonly used data types:
Control statement Used to control the execution flow of the program, such as conditional statements, loop statements, etc.
The conditional statement is divided into three parts: if, else-if and else. The following is an example:
if a > 10 {
fmt.Println("a is greater than 10")} else if a < ; 10 {
fmt.Println("a is less than 10")} else {
fmt.Println("a is equal to 10")}
There are two main types of loop statements: for and range. for is used to execute a set of statements multiple times, while range Used to iterate over each element in a collection.
The following is an example of a for statement, used to calculate the cumulative sum of 1 to 10:
sum := 0
for i := 1; i <= 10; i {
sum += i
}
fmt.Println("sum =", sum)
A function is a reusable block of code , which gives programmers the opportunity to reuse code they have written. In the Go language, functions are also first-class objects that can be passed as parameters to other functions and can be returned as return values. The following is an example of a function:
func add(a int, b int) int {
return a + b
}
In the above function, add receives two integer parameters and return their sum.
The above are some basic syntax of Go language. Of course there are other syntax features, such as structures, slices, arrays, pointers, etc. Learning these basics can help us write code that is more efficient, more reliable, and easier to maintain. If you are interested, you can continue to learn more.
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