Introduction to C:
    1--> What is C
    2--> First C program
        -> Example: [ greetings.c ]
    3--> Data types and variables in C
        -> Example: [ variables.c ]
    4--> Conditionals (if and else):
        -> testing/comparison/conditions
        -> Example: [ conditionals.c ]
    5--> Functions in C:
        -> Dividing code to sub-block of codes
        -> Reusing subblocks rather than rewriting them
        -> Example: [ functions.c ]
    6--> Arrays and for loop in C:
        -> grouping variables of same data type, elements, etc under one name
        -> Arrays memory layout
        -> array size and initializations ( int arrayA[ 5 ] = {1,2,3,4,5};)
        -> How can I print array elements without writing printf 5 times.
            -> by using for loop: for(i=0;i<5;i++){printf("%d",arrayA[i]);}
        -> Static Arrays
        -> Example: [ for_loop.c ]
    7--> Static 2D arrays in C:
        -> Why use 2D arrays
        -> syntax: arrayA[2][4] = { {1,2,3,4}, {5,6,7,8} };
        -> Matrix
        -> Nested For loop:
        -> Example: [ arrays.c ]
    8--> Pointers and Arrays in C:
        -> What is a pointer? (a variable holds the address of another variable)
        -> why use pointers?
        -> Dynamically allocating arrays with pointers
        -> Example: [ pointers_and_arrays.c ]
    --> Wrap UP:
        -> Example: [ pointers_and_arrays.c ]
        -> Exercise: [ compute_pi.c ]
            ->