China 
Africa 
Explore chapters and articles related to this topic
Python/NumPy Fundamentals
Published in Mehdi Ghayoumi, Deep Learning in Practice, 2021
An instruction that executes by the python interpreter is a statement. Some examples are as follows:import statements,assignment statement,if statements,for and while statements.A combination of variables, operators, and values (also function) needs to be evaluated as an expression (interpreter print the results). Here the assignment is a statement, and there are two evaluations for x and y. With an assignment statement, like x = 7, there is no evaluation (these are statements and just execute). Furthermore, its results create a reference from a variable. For example, x to 7, and when we use a print function for y (everything in python is a function), we can see its value.
Computer Programming
Published in Quamrul H. Mazumder, Introduction to Engineering, 2018
In a high-level programming language, a program is composed of many individual instructions called statements. A programming statement can be composed of keywords, operators, punctuation, and other allowable programming elements and must be arranged in the proper sequence to perform an operation. Simple statements are executed in sequence, or one after another, until all the statements are executed, but programming languages also include control structures that will alter the consecutive sequence executed in a predefined, structured manner. All computer programming languages utilize the simple statements and control structures discussed in this chapter, and once you become familiar with their basic functionality, switching from one programming language to another becomes more of a matter of learning new syntax instead of grasping entirely new concepts.
Digital Circuit Design with Very-High-Speed Integrated Circuit Hardware Description Language
Published in A. Arockia Bazil Raj, FPGA-Based Embedded System Developer's Guide, 2018
We used the vertical bar (|), which is equivalent to the or operator, to illustrate how to express a range of values. This is a useful operator to indicate ranges that are not adjacent, for example, 0 to 4 | 6 to 10. It should be noted that the combinational circuits can also be expressed in other ways, using concurrent statements such as the with–select construct. Since the case statement is a sequential statement, one can have nested casestatements as well. A loop statement is used to repeatedly execute a sequence of sequential statements. The syntax for a loop is: [ loop_label :]iteration_scheme loop sequential statements [next [label] [when condition]; [exit [label] [when condition]; end loop [loop_label];
Automated simulation and verification of process models discovered by process mining
Published in Automatika, 2020
Ivona Zakarija, Frano Škopljanac-Mačina, Bruno Blašković
Model checking is a formal method for software and hardware system verification. Its goal is to check whether a model of a system satisfies given specification. We will use the Spin model checker that was developed at the Bell Labs by G.J. Holzman [42]. Spin model checker is primarily used for formal verification of distributed systems, such as communication protocols. Spin can run random simulations of the process model or perform a verification of the process model by exploring all the possible execution paths. To formally describe process models, we use Spin's Promela language (Process meta language). Some basic elements of the Promela syntax are similar to the standard C language, but with a different semantics that implicitly enables non-determinism and statement blocking in the execution of the program code. For example, the order of execution in the conditional if–then-else statement is not predetermined – Spin will non-deterministically execute one of the branches that are not blocked. Specifications that are used to check model correctness are invariants – statements that must be true during the entire execution run. They can be defined as assert statements or more formally as Linear temporal logic (LTL) formulae [16,42]. LTL is a modal logic that uses temporal operators, e.g. finally and globally in addition to common logical operators, e.g. negation, conjunction, disjunction and logical implication.