Do memory allocations need to be freeed every time?

I have declared a global variable which is array of pointers and
allocated memory for each array variable by using malloc. Some thing
similar to below...

static char *arr[10];

main()
{
int i;

for(i = 0; i < 10; i++)
arr[i] = malloc(sizeof(char));

……..

}

Is freeing the allocated memory is really required every time, for a
program like this as freeing doesn’t bring in any change w.r.t
memory space (or) will it become a memleak some where down the line if
it is not freeed?

Thanx,
Ravindra. Bhadramraju
.

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