Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Assigning bc output to a variable
Top Forums Shell Programming and Scripting Assigning bc output to a variable Post 302871887 by apmcd47 on Thursday 7th of November 2013 07:19:47 AM
Old 11-07-2013
Quote:
Originally Posted by pina
I'm converting decimal to integer with bc, and I'd like to assign the integer output from bc to a variable 'val'.

E.g. In the code below: If b is 5000.000, lines 6 and 8 will output:
5000
(5000.000+0.5)/1 | bc

I'd like val to take the value 5000 though, rather than 5000.000

Does someone have any idea how to do that?


Try:
Code:
#! /bin/bash

while read b
do

    echo "($b+0.5)/1" | bc        # line 6 - works
    val=$(($b+0.5)/1 | bc)        # line 7 - should now work
    echo $val                          # line 8

done < infile

Basically $(...) invokes command substitution such that the output of command/subshell can be assigned to a variable.

Andrew
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Assigning output of command to a variable

Hi, I'm trying to assign the output of a command to a variable and then concat it with another string, however, it keeps overwriting the original string instead of adding on to the end of the string. Contents of test.txt --> This is a test var1="`head -n 1 test.txt`" echo $var1 (This is a... (5 Replies)
Discussion started by: oma04
5 Replies

2. Shell Programming and Scripting

assigning command output to a shell variable

I have the sql file cde.sql with the below contents: abcdefghij abcwhendefothers sdfghj when no one else when others wwhen%others exception when others Now I want to search for the strings containing when others together and ceck whether that does not occur more than once in the... (2 Replies)
Discussion started by: kprattip
2 Replies

3. Shell Programming and Scripting

assigning nawk output to shell variable

Hello friends, I doing the follwing script , but found problem to store it to a shell variable. #! /bin/sh for temp in `find ./dat/vector/ -name '*.file'` do echo $temp nawk -v temp=$temp 'BEGIN{ split(temp, a,"\/"); print a}' done output: ./dat/vector/drf_all_002.file... (6 Replies)
Discussion started by: user_prady
6 Replies

4. Shell Programming and Scripting

Assigning output of command to a variable in shell

hi, I want to assign find command result into some temporary variable: jarPath= find /opt/lotus/notes/ -name $jarFile cho "the jar path $jarPath" where jarPath is temporary variable. Can anybody help on this. Thanks in advance ----Sankar (6 Replies)
Discussion started by: sankar reddy
6 Replies

5. Shell Programming and Scripting

Assigning output to a variable

I am new to unix shell scripting. I was trying to convert each lines in a file to upper case. I know how to convert the whole file. But here i have to do line by line. I am getting it in the below mentioned script #!/bin/bash #converting lower to upper in a file #tr "" "" <file1... (3 Replies)
Discussion started by: jpmena
3 Replies

6. Shell Programming and Scripting

Assigning output of a command to variable

When I run time -p <command>, it outputs: real X.XX user X.XX sys X.XXwhere X.XX is seconds. How I can take just that first number output, the seconds of real time, and assign that to a variable? (9 Replies)
Discussion started by: jeriryan87
9 Replies

7. Shell Programming and Scripting

assigning SED output to a variable = trouble!

i'm on a Mac running BSD unix. i have a script in which i ask the user to input the name of a mounted volume. i then call SED to substitute backslashes and spaces in place of the spaces. that looks like this: echo "Enter the name of the volume" read Volume echo "You've chosen \"$Volume\""... (7 Replies)
Discussion started by: hungryd
7 Replies

8. Shell Programming and Scripting

Piping and assigning output to a variable in Perl

Hi All, I am trying to convert the below Csh code into Perl. But i have the following error. Can any expert help ? Error: ls: *tac: No such file or directory Csh set $ST_file = `ls -rt *$testid*st*|tail -1`; Perl my $ST_file = `ls -rt *$testid*st*|tail -1`; (10 Replies)
Discussion started by: Raynon
10 Replies

9. Shell Programming and Scripting

Assigning output from awk to variable

I have a script whose contents are as below result= awk 's=100 END {print s }' echo "The result is" $result The desired output is The result is 100 My script is running without exiting and i am also not getting the desired output. Please help (5 Replies)
Discussion started by: bk_12345
5 Replies

10. Shell Programming and Scripting

Expect - assigning UNIX command output to a variable

Hi, I'm writing a script that connects through ssh (using "expect") and then is supposed to find whether a process on that remote machine is running or not. Here's my code (user, host and password are obviously replaced with real values in actual script): #!/usr/bin/expect set timeout 1... (3 Replies)
Discussion started by: oseri
3 Replies

LEARN ABOUT CENTOS

sccs-val

sccs-val(1)							   User Commands						       sccs-val(1)

NAME

       sccs-val, val - validate an SCCS file

SYNOPSIS

       /usr/ccs/bin/val -

       /usr/ccs/bin/val [-s] [-m name] [-rsid] [-y type] s.filename...

DESCRIPTION

       The val utility determines if the specified s.files meet the characteristics specified by the indicated arguments. val can process up to 50
       files on a single command line.

       val has a special argument, `-', which reads the standard input until the end-of-file condition is detected. Each  line	read  is  indepen-
       dently processed as if it were a command line argument list.

       val generates diagnostic messages on the standard output for each command line and file processed and also returns a single 8-bit code upon
       exit as described below.

       The 8-bit code returned by val is a disjunction of the possible errors, that is, it can be interpreted as a bit string where  (moving  from
       left to right) the bits set are interpreted as follows:

       bit 0 = missing file argument
       bit 1 = unknown or duplicate option
       bit 2 = corrupted s.file
       bit 3 = can not open file or file not in s.file format
       bit 4 = the SCCS delta ID (SID) is invalid or ambiguous
       bit 5 = the SID does not exist
       bit 6 = mismatch between %Y% and -y argument
       bit 7 = mismatch between %M% and -m argument

       val  can  process  two  or  more  files	on a given command line, and in turn can process multiple command lines (when reading the standard
       input). In these cases, an aggregate code is returned which is the logical OR of the codes generated for each command line  and	file  pro-
       cessed.

OPTIONS

       The following options are supported:

       -s	Silent.  Suppresses the normal error or warning messages.

       -m name	Compares name with the %M% ID keyword in the s.file.

       -rsid	Checks to see if the indicated SID is ambiguous, invalid, or absent from the s.file.

       -y type	Compares type with the %Y% ID keyword.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions of the following environment variables that affect the execution of val: LANG, LC_ALL, LC_CTYPE, LC_MES-
       SAGES, and NLSPATH.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsprot 		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sccs(1), sccs-admin(1), sccs-delta(1), sccs-get(1), sccs-help(1), what(1), sccsfile(4), attributes(5), environ(5), standards(5)

DIAGNOSTICS

       Use the SCCS help command for explanations (see sccs-help(1)).

SunOS 5.10							    30 Sep 2002 						       sccs-val(1)
All times are GMT -4. The time now is 09:21 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy