Variables Cheatsheet

Program Structure

package main // Entry point package

import "fmt" // Standard library import

func main() {
    // Execution starts here
}

Variable Declaration

// Standard (Inside or Outside functions)
var x int = 10

// Short (Inside functions ONLY)
y := 20

// Multiple variables
a, b := 1, "hello"

Zero Values

• int: 0
• float64: 0.0
• string: ""
• bool: false

Basic Types

Type	Description	Example
int	Whole numbers	var i int = 42
float64	Decimals	f := 3.14
string	Text	s := "Go"
bool	True/False	b := true
byte	8-bit data	var d byte = 0xFF

Key Concepts

• Static Typing: Types are checked at compile time.
• Strong Typing: No automatic type conversion (must use int(val)).
• Compiled: Code is converted to a standalone machine binary.
• Go Runtime: Handles Garbage Collection (GC) automatically.
• Comments: // single and /* multi */.