In most of the cases, the next instruction to be performed is the one that immediately follows the current instruction in memory. Therefore, program counter helps us to get the next instruction. But sometimes it is required to change the sequence of instruction execution and for that instruction set should provide instructions to accomplish these tasks. For these instructions, the operation performed by the CPU is to upload the program counter to contain the address of some instruction in memory. The most common transfer-of-control operations found in instruction set are: branch, skip and procedure call.