ABS Function Programming Example
The following example finds an approximate value for a cube root.
It uses ABS to find the difference between two guesses to see if the
current guess is accurate enough.
DEFDBL A-Z
Precision = .0000001#
CLS 'Clear the screen
INPUT "Enter a value: ", Value 'Prompt for input
' Make the first two guesses.
X1 = 0.0# : X2 = Value
' Go until the difference between two guesses is
' less than the required precision.
DO UNTIL ABS(X1 - X2) < Precision
X = (X1 + X2) / 2.0#
' Adjust the guesses.
IF X * X * X - Value < 0.0# THEN
X1 = X
ELSE
X2 = X
END IF
LOOP
PRINT "The cube root is "; X
Sample Output
Enter a value: 27
The cube root is 2.999999972060323