- Code - Code or source code is a term used to describe a written set of instructions, written using the protocols of a particular language, such as Java, C, or Python.
- Expression - An expression is a legal grouping of letters, symbols, and numbers being used to represent the value of one or more variables. Expressions are highly used in a number of programming languages and many other programs, with each having its own set of legal and illegal expressions. Every expression contains one or more operands (objects being manipulated) and operators (symbols representing actions).
- Loop - A loop is a sequence of instructions that repeat the same process over and over until a condition is met and it receives the order to stop. In a loop, the program asks a question, and if the answer directs the program to perform an action, the action is performed, and the loop runs again, performing the same task. It runs until the answer is such that no action is required, and the code can proceed further. Loops are considered one of the most basic and powerful concepts in programming.
- Program - A computer program is termed as an organized collection of instructions, which when executed perform a specific task or function. A program is processed by the central processing unit (CPU) of the computer before it is executed.
- Variable - A value that can change, depending on conditions or on information passed to the program.
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