difference between command and statement
difference between command and statement
we can use switch statement in multiple time but in if statement we can not use multiple time
if-else implies a first statement, while else-if implies that we would know what else is but we don't because else is defined by if.
Delete statement deletes only the data from the table but you can apply some condition and only part of the data can be deleted. Truncate empties entire table. Drop deletes the table itself.
A declarative sentence makes a statement or provides information, while an imperative sentence gives a command or instruction. Declarative sentences usually end with a period, while imperative sentences often end with a period or exclamation mark.
Imperative is how the computer should do something. Declarative is what you would like the computer to do.
Declarative programming focuses on describing the desired results without specifying how to achieve them, while imperative programming involves providing specific step-by-step instructions on how to achieve a result. Declarative programming is more concerned with what needs to be done, while imperative programming is more concerned with how it should be done.
With an imperative sentence, the subject is understood and not necessarily stated. "Close the door." The subject is you and the verb is close.
These are all programming paradigms; they describe the "style" used to build the structure and elements of a computer program. Imperative programming is typically contrasted with declarative programming because they are mutually-exclusive (you won't find any programming languages that are both imperative and declarative), in the same way that you won't find any languages that have both a structured paradigm and a non-structured paradigm. The main difference between the two is that imperative programming describes how a result is to be achieved without specifying what is to be achieved, whereas declarative programming describes what is to be achieved without specifying how it is to be achieved. Another key difference is that imperative programming makes extensive use of changing-state and mutable data whereas declarative programming does not. Put simply, there are no assignment operations or side-effects in declarative programming. Given that the object-oriented programming (OOP) paradigm is based upon objects with member methods that can mutate the object's attributes, OOP is based upon the imperative paradigm. The functional programming paradigm is not to be confused with function calls which are based upon the procedural programming paradigm, which is itself based upon the structured programming paradigm, both of which are imperative. By "functional" we really mean mathematical functions, which are declarative. Although there are some imperative languages that do allow a type of functional programming style, at best they are a grey area because of the side-effects. Logical programming is also declarative and is based on relations.
A declarative sentence states a fact or description about something. (e.g. The ball is red.) An interrogative sentence is a question. (e.g. What color is the ball?) An exclamatory sentence uses expression or voice to present information. (e.g. I'm so excited you are coming.) An imperative sentence issues a command. (e.g. Go get the ball. Don't run in the hallway.)
procedural asks you to solve.
difference between command and statement
exclamatory ends with a ! and declarative just ends with a . just think of the word declarative as you are declaring something therefor you need a period to it to make sure you make your point (.)
What is the difference between a bar scale and a statement scale
A declarative statement introduces an identifier, and indicates its type, sometimes implicitly. It may also assign a value to the space indicated by the identifier which may or may not be mutable within the program. Declaratives are not considered executables. An executable statement can be any sort of statement requiring action, including assignment of a value to the space indicated by an identifier, calling a function or procedure, reading or writing, pausing or stopping execution, waiting for another process, etc.
In declarative programming, you specify what you want to achieve without explicitly providing the steps to reach that goal, while in imperative programming, you provide step-by-step instructions on how to achieve the desired outcome. Declarative languages focus on the "what" whereas imperative languages focus on the "how".