> For the complete documentation index, see [llms.txt](https://learngo.edugated.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learngo.edugated.com/basic-type.md).

# Basics types in Go

strings, integers, floats, booleans etc

Add operation on strings concatenate, **multiplication** on strings multiplicate [how](https://stackoverflow.com/questions/33139020/can-golang-multiply-strings-like-python-can)

Mathematical operations on int and float produce equivalent output with upcast (increasing in the degree of type)

**and / or / not** on boolean returns boolean

**Values**

```
package main

import (
	"fmt"
)


func main() {
	fmt.Println("hello world")
	// strings
	fmt.Println("hello" + "world")
	// int
	fmt.Printf("the int sum is %d", 1 + 2) //formatted string
	// float
	fmt.Println(1.2 + 23)
	// boolean
	fmt.Println(true && false)
	
}
```

**Variables**

```
package main

import (
	"fmt"
)


func main() {

	// variables
	var f int // change also dynamically, redeclaring it will cause error
	f = 4 // int
	f = 43
	fmt.Println(f)
	
	var g int = 4 
	fmt.Println(g)
	
	d := "string" // declare and initialize but d "alone" cannot be used second time
	fmt.Println(d)
	
	//d,_ := 23 // will cause no new variable
	//fmt.Println(d)
	
	/*
	// read below
	d,t := 23,12
	fmt.Println(d,t)
	*/
	
	// once you have declared the same variable using := you can reassign without changing its type, above examples does not run unless you remove 
	// previous declaration of d
	
	// other way of declaring
	var a,v,t int = 1,2,3
	fmt.Println(a,v,t)
	
}
```

**Constants**

```
package main

import (
	"fmt"
	"math"
)


func main() {
	
	// constants, string, boolean and numeric values
	
	const s = 23
	fmt.Println(s)
	_ = s
	
	// use of const
	const pi = 3.14
	fmt.Println(math.Sin(pi))
	
	}
```