I believe we are confused in Initialization and declaration.

int i ; // declaration
int i = 10 ; declaration + initialization

i= 15 ; // assignment

You cannot only do initialization without declaration.

As per the initial question is concerned it is stupid to initialize the array with different values.

int alpha [50] = {1,2*2,3*3,…………………} ;// wrong syntax

int alpha[50] = {0} ; //initialize all the fifty elements by 0

Naure’s solution presumes taht the instructor wants to *assign* values to the array not exactly initialize. I agree with the solution.