Go language provides a wealth of flow control statements for controlling the flow of program flow, including: conditional statements (if, switch); loop statements (for, while); practical cases: calculating factorials using if and for statements; others Flow control statements (break, continue, goto, defer).
In-depth understanding of Go language flow control statements
Flow control statements are the basic tools used to control the flow of program flow in programming. The Go language provides a wealth of flow control statements, including:
Conditional statements
if
statements: used according to Conditionally execute code blocks.
if condition { // 条件为 true 时执行的代码 } else { // 条件为 false 时执行的代码 }
switch
Statement: Used to execute a block of code based on one of multiple conditions.
switch variable { case value1: // variable 为 value1 时执行的代码 case value2: // variable 为 value2 时执行的代码 default: // 其他情况执行的代码 }
Loop statement
##for Loop: used to repeatedly execute a block of code.
for condition { // 条件为 true 时执行的代码 } for i := 0; i < 10; i++ { // i 从 0 到 9 执行 10 次循环 }
while Loop: used to execute a block of code as long as the condition is true.
while condition { // 条件为 true 时执行的代码 }
Practical case: Calculating factorial
The following is a Go language program for calculating factorial:package main import "fmt" func main() { var n int fmt.Print("请输入一个非负整数:") fmt.Scan(&n) if n < 0 { fmt.Println("输入无效,必须是非负整数") return } result := 1 for i := 1; i <= n; i++ { result *= i } fmt.Printf("%d 的阶乘为 %d\n", n, result) }
statement checks whether the input is valid and uses a for
loop to calculate the factorial.
The Go language also provides other flow control statements, including:
switch
statement.
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