new and make keyword in go

How does new and make keywords allocate memory in golang

new keyword:

• new is used to allocate memory for a variable of a specific type, including basic types (like int, float64, etc.) and composite types (like structs)
• It returns a pointer to the zero-initialized memory of the specified type
• Use new when you need a pointer to a newly allocated zero value of a type
• p := new(int) allocates memory on the heap and returns a pointer to it, whereas p := 0 simply declares a variable on the stack with an initial value of 0

make keyword:

• The make function is used to create a slice with a specific length and capacity. It gives you more control over the initial size and memory allocation of the slice
• make is used to create and initialize slices, maps, and channels, which are types that have underlying data structures
• make returns the type itself, not a pointer
• Use make when you need to initialize and allocate memory for slices, maps, or channels.
• Memory for the underlying array is immediately allocated based on the specified length and capacity.
• s := make([]int, 2, 4) allocates memory on the heap, whereas s := []int{} will only allocate memory after appending items to it