Float issues Post: 302309494

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comparing two float values

I am trying to compare 2 float values using if the foll code does not work a=1.4 b=1.6 if test $a -gt $b then echo "$a is max" else echo "$b is max" fi does -gt work for floating point numbers, if not how do go about for my requirement? can i use bc ? pls help thanks in advance...

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I had a variable 1:80 8 in one varialbe say var=1:80 8 i comapred the below if then -- else ---- thought if condition is true its always going in the else condition....its not giving any compilation errror also....is there any problem bcoz of space... can some one help...

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As expr is used for integer calculations, which command is used for float calculations.

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Today I spent longer than I'd like to admit figuring out how to write a Bourne shell IF statement that tests a FLOAT value before executing a block of statements. Here's the solution I found, which invokes bc. Hope this will come in handy for someone: value = testval = if then body...

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LEARN ABOUT OSF1

nint

floor(3)						     Library Functions Manual							  floor(3)

NAME

       floor,  ceil,  modf,  nint,   rint, trunc - Round floating-point numbers to floating-point integers, return the nearest integral value, and
       truncate a floating-point number

LIBRARY

       Math Library (libm.a)

SYNOPSIS

       #include <math.h>

       double floor   (double x);
       float  floorf  (float  x);
       long double floorl   (long double x);
       double ceil    (double x);
       float  ceilf   (float  x);
       long double ceill    (long double x);
       double modf    (double x, double *n);
       float  modff   (float  x, float	*n);
       long double modfl    (long double x, long double *n);
       double nint    (double x);
       float  nintf   (float  x);
       long double nintl    (long double x);
       double rint    (double x);
       float  rintf   (float  x);
       long double rintl    (long double x);
       double trunc   (double x);
       float  truncf  (float  x);
       long double truncl   (long double x);

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       floor():  XPG4

       ceil():	XPG4

       modf():	XPG4

       rint():	XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

DESCRIPTION

       The floor(), floorf(), and floorl() functions return the largest floating-point integer value less than or equal to  x.

       The ceil(), ceilf(), and ceill() functions return the smallest floating-point integer value greater than or equal to  x.

       The modf(), modff(), and modfl() functions split a floating-point number x into a fractional part f and an integer part i such that  |f|  <
       1.0 and (f + i) = x.  Both f and i have the same sign as x.  The modf(), modff(), and modfl() functions return f and store i into the loca-
       tion pointed to by n.

       The nint(), nintf(), and nintl() functions return the nearest integral value to x, except halfway cases are rounded to the  integral  value
       larger in magnitude. This corresponds to the FORTRAN generic intrinsic function nint().

       The  rint(), rintf(),  and rintl() functions round x to an integral value according to the current IEEE rounding direction specified by the
       user.

       The trunc(), truncf(), and truncl() functions truncate x to an integral value.  delim off

																	  floor(3)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

comparing two float values

Discussion started by: kavitha

2. Shell Programming and Scripting

expr+float argument: how can i do?

Discussion started by: mips

3. Shell Programming and Scripting

float comparison

Discussion started by: mkan

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Float calculations

Discussion started by: sharmavr