Q.What is the meaning of the symbol ‘~’?

Bitwise operators are a special feature of C that operate directly on the individual bits of integer data, rather than on whole numbers. This low-level control is one reason C is so useful for systems and hardware-related work.

The bitwise operators are:

• & bitwise AND - a result bit is 1 only if both corresponding bits are 1.
• | bitwise OR - a result bit is 1 if either corresponding bit is 1.
• ^ bitwise exclusive-OR (XOR) - a result bit is 1 if the two bits are different.
• ~ one's complement (NOT) - inverts every bit (each 1 becomes 0 and each 0 becomes 1).
• << and >> - left shift and right shift, which move the bits a given number of places. …