You might be aware that a computer program is a combination of many statements, which are written one after another. Broadly speaking, they are of two types:
1. Executable statements
2. Non-executable statements
Executable statements are those which have some instruction or command inbuilt in them? Non-executable statements are those in which there is no command; only information is present. These are used to define certain facts, to highlight or identify particulars. Those who are well acquainted with the programming languages might be aware of the usage of these statements. But, have you ever read the computer programs developed by your ancestors? The Vedas are the collection of their programming codes. Almost all statements of the Vedas can be divided into two categories- mantra brahmanatmakah shabdrashih- 'Brahman' and 'Mantra'. The statements of Brahman category comprise of instructions and commands, whereas the statements of the Mantra category do not consist of instructions- they hold varied information. Hence, the first category forms the 'Executable Statements', while the other makes the 'Non-executable Statements'. The various Vedic statements under these two categories:
1. Injunction Statements (vidhi vakya)- through these, open instructions are discharged? For example, satyam vada- Speak the truth, dharmam chara- Act righteously. You can clearly comprehend that these are Executable statements.
2. Sacrificial Statements (mantra vakya)- these are those Vedic Statements which contain direct or indirect information. For instance, agnimeekay purohitam; in this statement, a priest is only reminded of a fire-related ritual. Thus, you can distinctly make out that it is a Non-executable statement. Likewise, there are many other Vedic Statements which come under the afore-mentioned two categories. On the same ground, various other concepts of modern computer science, like Keywords, Operators, Programs, Sub-programs, Time-sharing, Password, etc. can be found in and tallied with the Vedas, the ancient computer science texts.
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