05-11-2009
how to compare 2 floating point no.
Hi,
Could any one tell me how to compare to floating point no. using test command. As -eq option works on only intergers.
i=5.4
if [ $i -eq 5.7]
then
echo "equal"
else
echo "not equal"
fi
here output will be equal even though no. are unequal.
Thanks,
ravi
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LEARN ABOUT SUNOS
islessequal
islessequal(3M) Mathematical Library Functions islessequal(3M)
NAME
islessequal - test if x is less than or equal to y
SYNOPSIS
#include <math.h>
int islessequal(real-floating x, real-floating y);
DESCRIPTION
The islessequal() macro determines whether its first argument is less than or equal to its second argument. The value of islessequal(x, y)
is equal to (x) <= (y); however, unlike (x) <= (y), islessequal(x, y) does not raise the invalid floating-point exception when x and y are
unordered.
RETURN VALUES
Upon successful completion, the islessequal() macro returns the value of (x) <= (y).
If x or y is NaN, 0 is returned.
ERRORS
No errors are defined.
USAGE
The relational and equality operators support the usual mathematical relationships between numeric values. For any ordered pair of numeric
values, exactly one of the relationships (less, greater, and equal) is true. Relational operators can raise the invalid floating-point
exception when argument values are NaNs. For a NaN and a numeric value, or for two NaNs, just the unordered relationship is true. This
macro is a quiet (non-floating-point exception raising) version of a relational operator. It facilitates writing efficient code that
accounts for quiet NaNs without suffering the invalid floating-point exception. In the SYNOPSIS section, real-floating indicates that the
argument is an expression of real-floating type.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
isgreater(3M), isgreaterequal(3M), isless(3M), islessgreater(3M), isunordered(3M), math.h(3HEAD), attributes(5), standards(5)
SunOS 5.10 1 Nov 2003 islessequal(3M)