C Instructions

Now that we have written a few programs let us look at the instructions that we used in these programs. There are basically three types of instructions in C: 

(a) Type Declaration Instruction
(b) Arithmetic Instruction
(c) Control Instruction

The purpose of each of these instructions is given below:

(a) Type declaration instruction
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To declare the type of variables used in a C program.

(b)  Arithmetic instruction
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To perform arithmetic operations between con-stants and variables.

(c) Control instruction
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To control the sequence of execution of various state-ments in a C program.
Since, the elementary C programs would usually contain only the type declaration and the arithmetic instructions; we would discuss only these two instructions at this stage. The other types of instructions would be discussed in detail in the subsequent chapters.