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The literals whose value vary from problem to problem are called?
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The literals whose value vary from problem to problem are called?
Literals whose value vary from problem to problem

Literals are fixed values that are used in a program to represent different types of data. They can be classified into different categories such as numbers, characters, strings, and boolean values. However, there are certain literals whose values can vary from problem to problem. These literals are known as variable literals.

Variable literals
Variable literals are placeholders for values that can change during the execution of a program. They are used to store and manipulate data and are given names called variables. The value of a variable can be assigned, modified, and retrieved as required by the program. Variable literals play a crucial role in programming as they allow the program to work with different inputs and produce different outputs.

Examples of variable literals
Here are a few examples of variable literals:

1. Number variables: Variables that store numerical values, such as integers or floating-point numbers. For example, a program that calculates the area of a rectangle may use variables named "length" and "width" to store the dimensions of the rectangle.

2. String variables: Variables that store sequences of characters. For instance, a program that asks for a user's name may use a variable named "name" to store the input provided by the user.

3. Boolean variables: Variables that can have only two values, true or false. These variables are commonly used in conditional statements and loops to control the flow of a program. For example, a variable named "isEven" could be used to store whether a given number is even or not.

Importance of variable literals
Variable literals are essential in programming as they allow for flexibility and adaptability in problem-solving. By using variable literals, programs can handle different inputs and produce different outputs based on the specific values stored in the variables. This enables the creation of dynamic and interactive programs that can cater to various scenarios and user interactions.

Conclusion
Variable literals are placeholders for values that can change during program execution. They allow for flexibility in programming by storing and manipulating data. By using variable literals, programmers can create dynamic and adaptable programs that can handle different inputs and produce different outputs.
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History History is a chronological account of events as they took place in the past.➢ Why should we study History?We should study history as it tells us about our past.Archaeological SiteIt gives us an understanding of our ancient culture and lifestyle.It helps us to solve the problems of the present-day world.➢ Time Frames of HistoryHistorians use a chronological sequence for a better understanding. The birth of Jesus Christ has been taken as year zero.Any event before Christ is called Before Christ (BC) and any event after the birth of Jesus is called Anno Domini (AD).The timeline of history is divided into three stages: (i) Prehistory(ii) Protohistory(iii) HistoryQuestion 1:All dates before the birth of Christ are counted backwards and usually have the lettersa.ACb.ADc.BCd.BD➢ Where did People Live?People lived near river valleys. This was because rivers provided water for all purposes.Traces of life were found near Sulaiman and Kirtar hills in North West.Traces of life even existed along Ganga. Mahajanapadas like Magadha, Kashi, Vajji, etc., flourished 2500 years ago.The Himalayan mountain has acted as a natural barrier between India and Central Asia for ages.The places where rice was first grown are to the north of the Vindhyas.➢ How was the name India derived?Our country is called India and Bharat.Bharat was used by the people of North India in the Sanskrit composition Rigveda.The word Indus traces its roots from the river Indus which is called Sindhu in Sanskrit.➢ How do we know about the past?Archaeologists and historians study several sources to tell us about the past. There are two sources - archaeological and literary.Archaeology: The study of human history and prehistory through the excavation of sites and the analysis of physical remains.Inscriptions: Inscriptions are writings on relatively hard surfaces such as stone or metal. In the past, when kings wanted their orders inscribed so that people could see, read and obey them, they used inscriptions for this purpose.InscriptionArchaeologists use sources like monuments, artefacts, inscription and coins.Handwritten or any other written record of the past is known as a literary source.Literary sources include two types of literature - religious literature and secular literature.Manuscripts are books that were written long ago by hand. These were written on palm leaves or on the specially prepared bark of a tree known as the birch, which grows in the Himalayas. These books dealt with all kinds of subjects: religious beliefs and practices, the lives of kings, medicine and science.ManuscriptQuestion 2:Where were the manuscripts written?a.On palm leafb.On peepal leafc.On banana leafd.On tulsi leaf➢ Who studied sources of History?There were two groups of people who studied history. One was called archaeologist and the other group was called historians.Archaeologists studied the remains of buildings made of stones, bricks, paintings and sculptures.The other group called historians were the people who studied the past and used information found in inscriptions, seals and scripts.Question 3:They study about the remains of buildings made of stone and brick, paintings and sculpture. They explore to find tools, weapons, ornaments, and coinsa.Archaeologistb.Historiansc.Information officersd.Geologist Related: Chapter Notes - What, Where, How and When??

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