Pointers in Go programming language or Golang is a variable which is used to store the memory address of another variable. Pointers in Golang are also termed as the special variables. The variables are used to store some data at a particular memory address in the system. The memory address is always found in hexadecimal format(starting with 0x like 0xFFAAF etc.).
In pointers, you are allowed to find the length of the pointer with the help of len() function. This function is a built-in function returns the total number of elements present in the pointer to an array, even if the specified pointer is nil. This function is defined under builtin.
func len(l Type) int
Here, the type of l is a pointer. Let us discuss this concept with the help of given examples:
Length of ptr1: 6 Length of ptr2: 3 Length of ptr3: 4
Value of p = 200 Value of p = 300 Value of p = 400 Value of p = 500 Length of arr: 6 Length of p: 4