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[LeanCalc.git] / help / ilog10
1 NAME
2     ilog10 - floor of logarithm to base 10
3
4 SYNOPSIS
5     ilog10(x)
6
7 TYPES
8     x           nonzero real
9
10     return      integer
11
12 DESCRIPTION
13     Returns the greatest integer n for which 10^n <= x.
14
15 EXAMPLE
16     > print ilog10(7), ilog10(77.7), ilog10(777), ilog10(.00777), ilog10(-1e27)
17     0 1 2 -3 27
18
19 LIMITS
20     none
21
22 LINK LIBRARY
23     long qilog10(NUMBER *q)
24
25 SEE ALSO
26     ilog2, ilog
27