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Full Discussion: 2 statements in for loop
Top Forums Shell Programming and Scripting 2 statements in for loop Post 302978299 by p1ne on Thursday 28th of July 2016 10:42:22 PM
Old 07-28-2016
Quote:
Originally Posted by RudiC
The for construct is used to iterate through a list or repeatedly evaluate an expression. Using it for one single value is at least, hmmm, questionable, as the loop variable is set to exactly that single value.

Thanks again RudiC, I understand now that loop is questionable for single value.

Code:
x=0
echo 'Enter number:'
read x
i=$((x*x))  #&& [ rem in $((((i % 2)) | bc)) ]   # integer arithmetics.
echo "Square of $x is $i."
rem=$((i % 2))                                   # bash can do integer arithmetics only, so NO bc needed...
if [ $rem -eq 0 ]
  then echo "$i is even, because the remainder of $i divided by 2 is 0."
  else echo "$i is odd, because the remainder of $i divided by 2 is $rem, not 0."
fi

 

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DIV(3)							     Linux Programmer's Manual							    DIV(3)

NAME
div, ldiv, lldiv, imaxdiv - compute quotient and remainder of an integer division SYNOPSIS
#include <stdlib.h> div_t div(int numerator, int denominator); ldiv_t ldiv(long numerator, long denominator); lldiv_t lldiv(long long numerator, long long denominator); #include <inttypes.h> imaxdiv_t imaxdiv(intmax_t numerator, intmax_t denominator); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): lldiv(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L; or cc -std=c99 DESCRIPTION
The div() function computes the value numerator/denominator and returns the quotient and remainder in a structure named div_t that contains two integer members (in unspecified order) named quot and rem. The quotient is rounded toward zero. The result satisfies quot*denomina- tor+rem = numerator. The ldiv(), lldiv(), and imaxdiv() functions do the same, dividing numbers of the indicated type and returning the result in a structure of the indicated name, in all cases with fields quot and rem of the same type as the function arguments. RETURN VALUE
The div_t (etc.) structure. CONFORMING TO
SVr4, 4.3BSD, C89. C99. The functions lldiv() and imaxdiv() were added in C99. EXAMPLE
After div_t q = div(-5, 3); the values q.quot and q.rem are -1 and -2, respectively. SEE ALSO
abs(3), remainder(3) COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2012-04-17 DIV(3)
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