A flowchart is a type of diagram the represents an algorithm, workflow or process, showing the steps as crate of various kinds, and their bespeak by connecting them v arrows. This diagrammatic depiction illustrates a solution model to a given problem. Flowcharts are provided in analyzing, designing, documenting or controlling a procedure or regimen in miscellaneous fields.

You are watching: Ovals are used as terminal symbols marking the starting and end of the pseudocode.

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Flow LineAn arrowhead coming native one symbol and ending at one more symbol represents that control passes to the price the arrow points to. The line because that the arrow can it is in solid or dashed. The definition of the arrow with dashed line may differ native one flowchart come another and also can be defined in the legend.
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TerminalRepresented as circles, ovals, stadiums or rounded (fillet) rectangles. They generally contain words “Start” or “End”, or an additional phrase signaling the start or finish of a process, such together “submit inquiry” or “receive product”.
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ProcessRepresented together rectangles. This shape is used to display that other is performed. Examples: “Add 1 to X”, “replace determined part”, “save changes”, etc….
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DecisionRepresented together a diamond (rhombus) mirroring where a decision is necessary, typically a Yes/No inquiry or True/False test. The conditional price is peculiar in the it has actually two arrows coming the end of it, usually from the bottom point and best point, one equivalent to correct or True, and one equivalent to No or False. (The arrows should always be labeled.) much more than 2 arrows have the right to be used, but this is usually a clear indicator that a complicated decision is being taken, in which case it might need to be broken-down additional or replaced with the “predefined process” symbol. Decision can also help in the filtering of data.
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Input/OutputRepresented as a parallelogram. Entails receiving data and displaying handle data. Have the right to only move from input come output and not vice versa. Examples: obtain X native the user; display screen X.
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AnnotationAnnotations represent comments or remarks around the flowchart. Favor comments found in high-level programming languages, they have no impact on the translate or actions of the flowchart. Sometimes, the shape is composed of a box v dashed (or dotted) lines.
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Predefined ProcessRepresented as rectangles through double-struck vertical edges; these are supplied to show facility processing actions which may be detailed in a separate flowchart. Example: PROCESS-FILES. One subroutine may have multiple distinct entry points or exit flows (see coroutine). If so, these are displayed as labeling ‘wells’ in the rectangle, and also control arrows affix to this ‘wells’.
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PreparationRepresented together a hexagon. May likewise be dubbed initialization. Shows operations which have no effect other 보다 preparing a worth for a subsequent conditional or decision step. Alternatively, this form is offered to change the Decision shape in the situation of conditional looping.
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On-Page ConnectorGenerally represented with a circle, mirroring where multiple regulate flows converge in a single exit flow. It will certainly have much more than one arrowhead coming into it, yet only one walking out. In straightforward cases, one may simply have actually an arrow point to another arrow instead. This are helpful to represent an iterative procedure (what in computer Science is referred to as a loop). A loop may, for example, consist of a connector whereby control first enters, handling steps, a conditional with one arrow exiting the loop, and also one going back to the connector. For additional clarity, wherever 2 lines accidentally cross in the drawing, one of them might be attracted with a little semicircle end the other, showing that no link is intended.
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Off-Page ConnectorRepresented together a home plate-shaped pentagon. Comparable to the on-page connector except allows for place a connector that connects to an additional page.

Other Shapes

A usual flowchart native older basic computer scientific research textbooks may have the adhering to kinds that symbols:

Labeled connectorsRepresented by one identifying label inside a circle. Labeled connectors are offered in complicated or multi-sheet diagrams to substitute for arrows. For each label, the “outflow” connector must always be unique, however there may be any number of “inflow” connectors. In this case, a junction in regulate flow is implied.Concurrency symbolRepresented by a dual transverse line v any number of entry and also exit arrows. These symbols are offered whenever 2 or an ext control flows should operate simultaneously. The leave flows space activated concurrently, when all of the entry flows have actually reached the concurrency symbol. A concurrency symbol with a single entry flow is a fork; one v a solitary exit circulation is a join.

Data-flow extensions

A number of symbols have actually been standardized because that data flow diagrams to stand for data flow, rather than manage flow. These signs may likewise be offered in manage flowcharts (e.g. Come substitute for the parallelogram symbol).

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A file represented as a rectangle through a wavy base;A hand-operated input represented by quadrilateral, through the height irregularly sloping up from left come right. An instance would it is in to denote data-entry indigenous a form;A hands-on operation represented by a trapezoid v the longest parallel side at the top, to represent an procedure or mediate to procedure that can only it is in made manually.A Data record represented through a cylinder.

Software

Diagramming