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Full Discussion: Check if input is an integer or a floating point?
Top Forums UNIX for Dummies Questions & Answers Check if input is an integer or a floating point? Post 302403215 by krishnampkkm on Thursday 11th of March 2010 10:02:01 PM
Old 03-11-2010
Check if input is an integer or a floating point?
Hiii

I actually intent to check the integer or floating point number input by user i.e. 23, 100, 55.25, 12.50 ..etc. However, when someone input strings or alpha character, my program has to show invalid input.!! Is there any Unix shell script syntax can help me to check ?

Thanking you
 

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LEARN ABOUT PHP

values.h

values.h(3HEAD) 						      Headers							   values.h(3HEAD)

NAME

       values.h, values - machine-dependent values

SYNOPSIS

       #include <values.h>

DESCRIPTION

       This file contains a set of manifest constants, conditionally defined for particular processor architectures.

       The  model  assumed  for  integers  is binary representation (one's or two's complement), where the sign is represented by the value of the
       high-order bit.

       BITS(type)		       The number of bits in a specified type (for example, int).

       HIBITS			       The value of a short integer with only the high-order bit set.

       HIBITL			       The value of a long integer with only the high-order bit set.

       HIBITI			       The value of a regular integer with only the high-order bit set.

       MAXSHORT 		       The maximum value of a signed short integer.

       MAXLONG			       The maximum value of a signed long integer.

       MAXINT			       The maximum value of a signed regular integer.

       MAXFLOAT, LN_MAXFLOAT	       The maximum value of a single-precision floating-point number, and its natural logarithm.

       MAXDOUBLE, LN_MAXDOUBLE	       The maximum value of a double-precision floating-point number, and its natural logarithm.

       MINFLOAT, LN_MINFLOAT	       The minimum positive value of a single-precision floating-point number, and its natural logarithm.

       MINDOUBLE, LN_MINDOUBLE	       The minimum positive value of a double-precision floating-point number, and its natural logarithm.

       FSIGNIF			       The number of significant bits in the mantissa of a single-precision floating-point number.

       DSIGNIF			       The number of significant bits in the mantissa of a double-precision floating-point number.

SEE ALSO

       intro(3) math.h(3HEAD)

SunOS 5.10							    2 Mar 1993							   values.h(3HEAD)
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