What is Flow control: Definition and 13 Discussions

In computer science, control flow (or flow of control) is the order in which individual statements, instructions or function calls of an imperative program are executed or evaluated. The emphasis on explicit control flow distinguishes an imperative programming language from a declarative programming language.
Within an imperative programming language, a control flow statement is a statement that results in a choice being made as to which of two or more paths to follow. For non-strict functional languages, functions and language constructs exist to achieve the same result, but they are usually not termed control flow statements.
A set of statements is in turn generally structured as a block, which in addition to grouping, also defines a lexical scope.
Interrupts and signals are low-level mechanisms that can alter the flow of control in a way similar to a subroutine, but usually occur as a response to some external stimulus or event (that can occur asynchronously), rather than execution of an in-line control flow statement.
At the level of machine language or assembly language, control flow instructions usually work by altering the program counter. For some central processing units (CPUs), the only control flow instructions available are conditional or unconditional branch instructions, also termed jumps.

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  1. tracker890 Source h

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  2. M

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  3. B

    HVAC High Flow Control with High Pressure and Temperatures

    Hello all, I am currently building a test bench that can input a high amount of flow, pressure and temperature into an Air Cycle machine. The inlet to the machine requirements are: Flow = 71 lbs/min P = 48 PSIa T = 235 degree F Diameter = 3 inches In order to produce these conditions, I have...
  4. M

    What is the difference between nozzle (or a ventury) and flow control valve?

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  5. A

    What is the Best Control System for Compressed Air in a Drone?

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  6. T

    I How Can Boundary Layer Suction Reduce Flow Separation in Pipe Expansion?

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  7. S

    What is the flow through pipe in an open channel?

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  8. campblor

    Thermodynamics flow control?

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  9. F

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  10. J

    Research Labs for Flow Control - RPI & Maryland

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  11. E

    Mass flow control and ideal gas calculation

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  12. V

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    hello i am a mech engg student, i have few doubts in fluid dynamics and thermal engg subjects.. i would like to be cleared of them by this discussion forums could anyone please explain the principle of flow control using valves...waiting for ...
  13. J

    Energy Flow Control Systems

    Relevant question An energy flow control system is one where electrical signals are used to control the flow of energy. quite often electrical energy. A modern example of one such system is the manual control of the speed of a sewing machine motor by way of a foot opearated variable...
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