An array in Go is a fixed-size collection of elements of the same type. Once declared, its size cannot be changed.

var users [5]string
users[0] = "Sam"
users[1] = "Jack"
users[4] = "Rana"

fmt.Println(users)          // Output: [Sam Jack     Rana]
fmt.Println(len(users))     // Output: 5

You can also initialize an array directly:

sports := [3]string{"Football", "Cricket", "PUBG"}
fmt.Println(sports)         // Output: [Football Cricket PUBG]
fmt.Println(len(sports))    // Output: 3

N.B.:

• Arrays in Go are zero-indexed.
• You cannot access or assign beyond the defined size (e.g., users[5] will cause a compile-time error).
• Elements are automatically initialized with zero values:
  • "" for strings
  • 0 for numbers
  • false for booleans

var nums [4]int
fmt.Println(nums)       // [0 0 0 0]

for index, value := range sports {
	fmt.Printf("Index %d: %s\n", index, value)
}

You’ll usually work with slices, which are more flexible, but understanding arrays first builds a solid foundation.