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39 lines
750 B
Plaintext
39 lines
750 B
Plaintext
NAME
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digit - digit at specified position in a decimal representation
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SYNOPSIS
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digit(x, y)
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TYPES
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x real
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y integer
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return integer
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DESCRIPTION
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By extending the digits on the left, and if necessary, the digits
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on the right, by infinite strings of zeros, abs(x) may be considered
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to have the decimal representation:
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... d_2 d_1 d_0.d_-1 d_-2 ...
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digit(x,y) then returns the digit d_y.
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EXAMPLE
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> x = 12.34
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> print digit(x,2), digit(x,1), digit(x,0), digit(x,-1), digit(x,-2)
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0 1 2 3 4
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> x = 10/7
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> print digit(x,1), digit(x,0), digit(x,-1), digit(x,-2), digit(x,-3)
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0 1 4 2 8
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LIMITS
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If x is not an integer, y > -2^31
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LIBRARY
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long qdigit(NUMBER *x, long y)
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SEE ALSO
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bit
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