how to array in c++

int foo [] = { 16, 2, 77, 40, 12071 };

int foo [5];

// Array declaration by initializing elements 
int arr[] = { 10, 20, 30, 40 } 
  
// Compiler creates an array of size 4. 
// above is same as  "int arr[4] = {10, 20, 30, 40}" 

int foo [5] = { 16, 2, 77, 40, 12071 }; 

// datatype var_name[howmuch value you need to store] = {values, values}
int a[5] = {1, 2 3, 4, 5};