Sponsored Content
Top Forums Shell Programming and Scripting Using IF statements with maths where the input is not an integer Post 302546817 by yazu on Friday 12th of August 2011 08:40:33 AM
Old 08-12-2011
Try string comparison:
Code:
if [ "$input" != "0" ]; then
...


Last edited by yazu; 08-12-2011 at 10:18 AM.. Reason: double posting
This User Gave Thanks to yazu For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Problem with Maths

Heres a script i wrote as a bit of practise. What it does is insert a line in the middle of a file. The line being $1 and the file being $2 #!/bin/bash rm tempfile touch tempfile count=1 linenum= `wc -l < $2` if then echo $1 >> $2 else even=`expr "$linenum" % 2` if then... (3 Replies)
Discussion started by: Quesa
3 Replies

2. Shell Programming and Scripting

isql input file with multiple sql statements

I've got: isql -U $USERID -S $SERVER -D $DATABASE -i inputfile.sql -o outputfile.txt in inputfile I have: go sql#1 go sql#2 go sql#3 go I also tried without "go" and with";" instead which did not work SQL statements will work if I paste them directly into the script and use EOF ... (0 Replies)
Discussion started by: Cailet
0 Replies

3. Shell Programming and Scripting

Perl - maths equation - need help

if input to the perl program is ' ( p * ((a+b) * (c+d))) + q ' it shuld give the output as ' pac + pad + pbc + pbd + q ' .can anyone suggest a way to do this ? (7 Replies)
Discussion started by: Anuj8584
7 Replies

4. Programming

How i can read a long integer from standar input and a string with as many characters as specified..

how i can read a long integer from standar input and a string with as many characters as specified in the number? i thing that i must use the read command ofcourse.... (6 Replies)
Discussion started by: aintour
6 Replies

5. Shell Programming and Scripting

Maths with variables

Hello, I'm trying to write a while loop for a decimal value in tcsh which I know can't be done. Instead I want my increments to be one order of magnitude too large and then divide it by 10 when I use the variable. However, I don't know how to divide my variable and set it as another. set... (1 Reply)
Discussion started by: DFr0st
1 Replies

6. UNIX for Dummies Questions & Answers

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 (2 Replies)
Discussion started by: krishnampkkm
2 Replies

7. Programming

I don't know how to replace input char with appropriate integer

Hi guys, I asked for help on programming forums and no one didn't helped me so I ask for help here. I am playing with some tasks from my book and I can't figure where did I get wrong. From the first program I get a blank screen, program won't generate 10*10 matrix. And second problem is I... (6 Replies)
Discussion started by: solaris_user
6 Replies

8. Shell Programming and Scripting

Simple maths calculator loop.

Hi, I am trying to make a maths calculator that: 1. Prompts the user for a number. 2. Prompts the user for an operation (add, subtract, divide or multiply) 3. Prompts the user for a number. 4. Prompts the user for another operation (same as above) OR the option to get the result for the... (4 Replies)
Discussion started by: johnthebaptist
4 Replies

9. Shell Programming and Scripting

Maths in shell scripts

Hi, Need help on this. I need to increment a variable by 1 but retain as 2 characters. I am using expr to do additions: NEWSERIAL=`expr $SERIAL + 1` $SERIAL can range from 01-99. After adding "1", I need the result to be 2 characters, eg: 02+1 = 03. By default expr will truncate the... (4 Replies)
Discussion started by: vchee
4 Replies

10. Shell Programming and Scripting

Calculate the constant e to 14+ decimal places using integer maths.

Hi guys... I am loving this integer maths thing. 64 bit systems are certainly easier than 32 bit, but hey, I don't intend to leave out my fav' platform. Using one of the 'Brothers' methods, URL inside the code. #!/bin/sh # # #!/usr/local/bin/dash # e_constant.sh # Brother's formula . #... (2 Replies)
Discussion started by: wisecracker
2 Replies
GLPIXELZOOM(3G) 														   GLPIXELZOOM(3G)

NAME
glPixelZoom - specify the pixel zoom factors C SPECIFICATION
void glPixelZoom( GLfloat xfactor, GLfloat yfactor ) PARAMETERS
xfactor, yfactor Specify the x and y zoom factors for pixel write operations. DESCRIPTION
glPixelZoom specifies values for the x and y zoom factors. During the execution of glDrawPixels or glCopyPixels, if (xr, yr) is the cur- rent raster position, and a given element is in the mth row and nth column of the pixel rectangle, then pixels whose centers are in the rectangle with corners at (xr+n.xfactor, yr+m.yfactor) (xr+(n+1).xfactor, yr+(m+1).yfactor) are candidates for replacement. Any pixel whose center lies on the bottom or left edge of this rectangular region is also modified. Pixel zoom factors are not limited to positive values. Negative zoom factors reflect the resulting image about the current raster posi- tion. ERRORS
GL_INVALID_OPERATION is generated if glPixelZoom is executed between the execution of glBegin and the corresponding execution of glEnd. ASSOCIATED GETS
glGet with argument GL_ZOOM_X glGet with argument GL_ZOOM_Y SEE ALSO
glCopyPixels(3G), glDrawPixels(3G) GLPIXELZOOM(3G)
All times are GMT -4. The time now is 04:45 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy