scanf() or atoi() function can be used to convert a string like "436" in to integer.
The prototypes of all standard library string functions are declared in the file string.h.
The itoa function can convert an integer in decimal, octal or hexadecimal form to a string.
Is standard library a part of C language?
If the two strings are found to be unequal then strcmp returns difference between the first
non-matching pair of characters.