Basic Data Types and Type Conversion

Snippet

Basic Data Types and Type Conversion

Go is a statically typed language with explicit type declarations. The basic types include int for integers, float64 for decimal numbers, bool for true/false values, and string for text. Go does not allow implicit type conversion between different types - you must explicitly convert using the syntax destinationType(variable).

snippet.go
go
package main
 
import (
    "fmt"
    "reflect"
)
 
func main() {
    var i int = 42
    var f float64 = 3.14
    var b bool = true
    var s string = "Go"
 
    fmt.Printf("int: %d, type: %s\n", i, reflect.TypeOf(i))
    fmt.Printf("float: %.2f, type: %s\n", f, reflect.TypeOf(f))
    fmt.Printf("bool: %t, type: %s\n", b, reflect.TypeOf(b))
    fmt.Printf("string: %s, type: %s\n", s, reflect.TypeOf(s))
 
    converted := float64(i)
    fmt.Println("Converted int to float64:", converted)
}

Breakdown

var i int = 42

Integer variable holding whole numbers

var f float64 = 3.14

Float64 variable holding decimal numbers (64-bit precision)

var b bool = true

Boolean variable holding true or false

var s string = "Go"

String variable holding text sequences

float64(i)

Explicit type conversion from int to float64 - Go requires explicit casts

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Basic Data Types and Type Conversion

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