To convert int64 to string in Golang, use the “strconv.Itoa()” function. The function returns a string representation of a given integer. Example 1: Using strconv.Itoa() function package main import ( “fmt” “strconv” ) func main() { s := strconv.Itoa(99) fmt.Println(s) } Output 99 Example 2: Convert int64 to string with base To get the string … Read more
To append a slice in Golang, you can use the “append()” function. The append() is a built-in function that appends any number of elements to the end of a slice and returns the updated slice. It doesn’t modify the original slice but creates a new slice, copies all the elements from the original slice, and … Read more
You can use the “math.Pi” constant from the standard library math package to get the pi(π) value in Golang. The math.Pi constant returns the “3.141592653589793″, which is the float64 value. Example package main import ( “fmt” “math” ) func main() { pi := math.Pi fmt.Println(pi) } Output 3.141592653589793 This value is only an approximation of … Read more
To iterate the fields of a struct in Golang, you can use the reflect package’s “ValueOf()” function to iterate over the fields of a struct. Example package main import ( “fmt” “reflect” ) type Student struct { Name string Rollno int City string } func iterateStructFields(input interface{}) { value := reflect.ValueOf(input) numFields := value.NumField() fmt.Printf(“Number … Read more
To check if a variable is nil in Go, you can use the “comparison operator(==)”. The nil value is zero for pointers, functions, interfaces, maps, slices, and channels. When a variable of these types is not initialized, its value is nil. Example Here’s an example demonstrating how to check for nil values in Go. package … Read more
To convert a rune to an int, you can use the “int()” function. Example package main import “fmt” func main() { r := ‘B’ intValue := int(r) fmt.Println(“Rune as int:”, intValue) } Output Rune as int: 66 In this code example, a rune “r” represents the Unicode code point for the letter “B”. You can … Read more
To convert a string to uint8 in Golang, you can use the “strconv.ParseUint()” function. The ParseUint() function accepts a string, base (e.g., 10 for decimal, 16 for hexadecimal), and bit size (8 for uint8) and returns the corresponding uint64 value if the conversion is successful; otherwise, an error. Example package main import ( “fmt” “log” … Read more
To check the Golang version, you can use the “go version” command Mac. This command prints the version of Go currently installed on your system. $ go version go version go1.19.3 darwin/arm64 In this example, the “go version” command prints the current version installed on the system. The output shows that the installed version is … Read more
A byte array in Golang is a fixed-size, ordered collection of elements where each element is a byte. A byte is an 8-bit unsigned integer with a value ranging from 0 to 255. To create a byte in Go, assign an ASCII character to a variable. A byte in Golang is an unsigned 8-bit integer. Byte arrays … Read more
To print the values of slices, you can use the “fmt.Println()” function. The fmt.Println() function prints one or more values, followed by a newline, to the standard output. Example Here is an example of how to create a slice, take a sub-slice, and print the values of the original slice and its sub-slice. package main … Read more