COMP1 Reviewer — Flowcharting & Control Structures

A set of vocabulary flashcards covering flowchart definitions, symbols, and sequence control structures from the COMP1 Reviewer notes.

Flowchart

A graphical representation of the logical sequence of steps to be performed in a program.

I – P – O

The basic pattern every flowchart follows, standing for Input (data received), Process (operations performed), and Output (results produced).

Terminal

A flowcharting symbol that marks the start and end point of the program.

Initialization

A flowcharting symbol used to assign initial values to variables, such as $NUM1 = 0$ or $SUM = 0$.

Decision

A flowcharting symbol that selects a path based on a condition, typically marked as yes/no or true/false.

Data

A flowcharting symbol representing variables to be processed; it is used specifically for input/output statements.

Process

A flowcharting symbol used to execute arithmetic operations and calculations.

Arrow Lines

Symbols that show the direction of flow in the processing of data.

Off-Page Connector

A symbol that connects one part of the flowchart to another part located on the next page.

On-Page Connector

A symbol that connects one part of the flowchart to another part on the same page.

Predefined Process

A symbol representing a group of operations that are detailed in a separate flowchart.

Manual Process

A symbol indicating that a manual process is to be performed.

Document

A flowcharting symbol representing a printed document or report.

Display

A flowcharting symbol representing information shown on a display, such as a screen.

Sequential Access Storage

A symbol representing data stored on sequential media, such as magnetic tape.

Direct Access Storage

A symbol representing data stored on a direct-access device.

Magnetic Disk

A symbol representing data stored on a magnetic disk.

Card

A symbol representing a punched card used as an input or output medium.

Punched Tape

A symbol representing punched tape used as an input or output medium.

Control Structure

A structure that organizes the flow of control in a program.

Three types of Control Structures

The three types consist of the sequence control structure, selection control structure, and iteration control structure.

Sequence Control Structure

A structure where control flows from one processing box to the next, and statements are executed one after another in the order they appear with no branching.

SUM calculation (Worked Example)

The formula used to compute the total of three numbers in a sequence flowchart: $SUM = NUM1 + NUM2 + NUM3$.

AVE calculation (Worked Example)

The formula used to compute the average of the sum in a sequence flowchart: $AVE = SUM / 3$.