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Six Basic Computer Operations

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Six Basic Computer Operations

1.      A computer can receive information (Seattlecentral.edu n.d.).

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A computer necessarily derives information from hardware devices such as the keyboard, driver, etc. (Seattlecentral.edu n.d.). “Get” and “Read” are prescribed in the pseudocode and the computer automatically does the action (Seattlecentral.edu n.d.). “Get” is performed by the computer when algorithm is to collect data from the keyboard while “read” is performed when the algorithm is to obtain information from a file (Seattlecentral.edu n.d.). This is part of the computer’s input component (Jamesreilly.

com n.d.).

Example as provided by Seattlecentral.edu (n.d.):

Read student name (from the student master file).
Get system date (from the computer system).
Read student ID number.
Get order.
2.      A computer can put out information (Seattlecentral.edu n.d.).

A computer can send out information to hardware such as printers, CD’s, and other devices (Seattlecentral.edu n.d.). “Print”, “put”, “output” or “display” are the commands that a user can instruct a computer to do (Seattlecentral.

edu n.d.). Print is used to command the computer to send information to a printer (Seattlecentral.edu n.d.). “Write” is used to write to a file on an output driver (Seattlecentral.edu n.d.). “Put”, “display” or “output” are used to display information on the screen. This function is part of a computer’s output function (Jamesreilly.com n.d.).

Example as provided by Seattlecentral.edu (n.d.):

Print “End of the Output”
Write student record to master file
Put out name, address and post code
Output grade; Display “an input error occurred, please re-enter.”
3.      A computer can perform arithmetic operations (Seattlecentral.edu n.d.).

The programmer can use “plus”, “minus”, “multiply” and “divide” or “+”, “-“, “*” or “/” to perform such operations. Parenthesis “()” are also frequently used. The computer also follows PENMDAS rule of arithmetic. Parentheses first, exponent second, negation third, multiplication and/or division next and addition and/or subtraction is last. Without following this, wrong values will be computed by the machine. This is part of the computer’s processing component (Sautelet n.d.).

Example as provided by Seattlecentral.edu (n.d.):

For an expression Total = 10 + 15 * 2 / 4 ^ 2 -(2 + 3) , the order of computation is following:

Total = 10 + 15 * 2 / 4 ^ 2 -(2 + 3)
Total = 10 + 15 * 2 / 4 ^ 2 -(5)
Total = 10 + 15 * 2 / 16 -(5) ( 5 as a negative value)
Total = 10 + 15 * 2 / 16 – 5
Total = 10 + 30 / 16 – 5
Total = 10 + 1.875 – 5
Total = 11.875 – 5
Total = 6.875
4.      A computer can assign a value to a variable or memory location (Seattlecentral.edu n.d.). This is part of the computer’s processing component (Sautelet n.d.)

Three situations when this can occur are as follows:

1.      Providing information with initial value. “Initialize” or “Set” are used as commands (Seattlecentral.edu n.d.).

2.      Value is assigned from processing consequence. “=” is used as the symbolic command (Seattlecentral.edu n.d.).

3.      Saving the information is allowed. “Save” or “store” command is used.

Example as provided by Seattlecentral.edu (n.d.):

Initialize total_score to 0: total_score = 0
Set student_count to 0: student_count = 0
total_score = total_score + score1
student_count = student_count + 1
class_average = total_score / student_count
Store class_average in class_average_quiz1
5.      The computer can compare between alternatives and the select the more appropriate action (Seattlecentral.edu n.d.). This is part of the computer’s processing component (Sautelet n.d.).

“If”, “then” “else” are the commands a programmer may use to do these commands. “If” does the comparison, “then” or “else” command determines the better option.

6.      A computer can repetitively do actions (Seattlecentral.edu n.d.).

“Do While” and “End Do” are the commands for this process (Seattlecentral.edu n.d.). A computer can do endless repetitions as long as conditions for re-initiation are met (Seattlecentral.edu n.d.). This is part of the computer’s processing component (Sautelet n.d.)

References:

Jamesreilly.com. (n.d.). Basic computer operations. Retrieved, 22 July

2010 from http://www.jamesreilly.com/smc/et11/computers/page3.html

Sautelet, D. (n.d.). How to identify basic computer operations. e-how.com. Retrieved, 22 July

2010 from http://www.ehow.com/how_5521835_identify-basic-computer-operations.html

Seattlecentral.edu. (n.d.).  Pseudocode.  Retrieved, 22 July

2010 from http://www.seattlecentral.edu/faculty/ymoh/mic110vb/pseudocode.htm

 

Cite this Six Basic Computer Operations

Six Basic Computer Operations. (2016, Oct 01). Retrieved from https://graduateway.com/six-basic-computer-operations/

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