What is Arguments Passing By Value Methods?

  • When the argument is sent by value, the original value of the argument does not change after the SUB-Program of function call. To pass the argument by value argument variable is enclosed in parenthesis.

  • Eg: A program to find the sum of the square of the digits in given number.
DECLARE SUB sum (n)
CLS
INPUT "Enter the ending value of the series"; n
PRINT "The value of n before calling the SUB procedure is "; n
CALL sum ((n))
PRINT "The value of n after the completion of the SUB procedure is "; n
END

SUB sum (n)
s = 0
WHILE n <> 0
    r = n MOD 10
    s = s + r ^ 2
    n = n \ 10
WEND
PRINT "The sum of the square of the digits is "; s
END SUB

  • Explanation: 
    • Here, if the user run the program giving the value 45, the output value of n before calling the SUB procedure will be 45.
    • And the value of s will be 41.
    • And the value of n after the completion of SUB procedure will be 45.

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