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So, an integer variable is a scalar value. This means that you can have any integer inside of it that you want. Scalar generally means one-dimensional, so it can be any number on that dimension, like the number line.
int **arr = (int **)malloc(r * sizeof(*arr)); sizeof(int **) and sizeof(int *) should return the same value. The expression âsizeof(int*)â looks more appropriate when we allocate memory for a single pointer or an array of single pointers.In sizeof, we specify datatype. Here *arr means means data type of value at address âarrâ. The data type of value is int *. Now we have replaced *arr with int * to avoid any confusion.nt **arr = (int **)malloc(r * sizeof(*arr)); sizeof(int **) and sizeof(int *) should return the same value. The expression âsizeof(int*)â looks more appropriate when we allocate memory for a single pointer or an array of single pointers. In sizeof, we specify datatype.