Sponsored Content
Full Discussion: random number
Top Forums Programming random number Post 302708283 by elixir_sinari on Monday 1st of October 2012 10:41:05 AM
Old 10-01-2012
Like this?
Code:
awk -v totrecs="$(wc -l < file)" 'BEGIN{srand()
ranrec=int(1+totrecs*rand())}
NR==ranrec{print;exit}' file

This User Gave Thanks to elixir_sinari For This Post:
 

10 More Discussions You Might Find Interesting

1. Programming

How to generate a random number?

How to generate a random integer with specific range(for example, from 1 to 1000)? Also, how to convert a floating point number into a integer? (2 Replies)
Discussion started by: MacMonster
2 Replies

2. Programming

Random number generation

Hi...How can I generate random numbers between a given range ...preferably between 1 and 100...in UNIX C programming...? I tried out functions like rand(),drand48() etc but didnt get satisfactory results... Thanks a lot in advance.......... (1 Reply)
Discussion started by: tej.buch
1 Replies

3. Shell Programming and Scripting

Regarding Random Number Genration

HI please help me in solving this issue. I have a shell script which consists of ten statemnts ( i mean 10 executable statments)...........and if i run that script the 10 statmenst will execute continously ............ But now my probelm is i have to write another script --> to... (0 Replies)
Discussion started by: lalitka
0 Replies

4. Shell Programming and Scripting

ksh: random number between 1-10

How do I create a random number between 1 and 10 in kornshell? (2 Replies)
Discussion started by: dangral
2 Replies

5. Programming

C Help; generating a random number.

Im new to C, and Im having a hard time getting a random number. In bash, I would do something similar to the following to get a random number; #!/bin/bash seed1=$RANDOM seed2=$RANDOM seed3=$RANDOM SEED=`expr $seed1 * $seed2 / $seed3` echo ${SEED%.*} Now, in online examples... (4 Replies)
Discussion started by: trey85stang
4 Replies

6. Programming

Random number is not reused

I need to generate and reuse a 5 digit random number every time my program is executed. But the following generates random numbers every time the function is called. #include <stdio.h> #include <stdlib.h> #include <sys/types.h> #include <sys/stat.h> #include <string.h> #include <time.h> ... (12 Replies)
Discussion started by: limmer
12 Replies

7. Programming

Generate random number

I saw this formula to generate random number between two specified values in shell script.the following. $(((RANDOM%(max-min+divisibleBy))/divisibleBy*divisibleBy+min)) Give a example in book. Generate random number between 6 and 30.like this. $(((RANDOM%30/3+1)*3)) But I have a... (1 Reply)
Discussion started by: luoluo
1 Replies

8. Shell Programming and Scripting

Random pieces of number

Hello folks, i have number for example 10 and i want to divide into 4 random pieces that may be (6+2+1+1). How can i do this via script i have random number 234951 and i want to divide into 31 pieces. (6 Replies)
Discussion started by: learnbash
6 Replies

9. Shell Programming and Scripting

Create random number

Hi, I'm trying to create a script that will print random numbers with length of three. Below is the expected out. 928-377-899 942-458-310 951-948-511 962-681-415 995-161-708 997-997-209 thanks (4 Replies)
Discussion started by: reignangel2003
4 Replies

10. Shell Programming and Scripting

Generating Random Number in certain range

Hi there I am trying to generate a random number between 40 and 70 using the shell here is my code so far and it keeps going above 70. all help much appreciated! comp=$(( RANDOM%70+40 )) echo $comp (4 Replies)
Discussion started by: faintingquiche
4 Replies
rand(3UCB)					     SunOS/BSD Compatibility Library Functions						rand(3UCB)

NAME
rand, srand - simple random number generator SYNOPSIS
/usr/ucb/cc[ flag ... ] file ... int rand() int srand( seed); unsigned seed; DESCRIPTION
rand() uses a multiplicative congruential random number generator with period 2**32 to return successive pseudo-random numbers in the range from 0 to "2**31 -1." srand() can be called at any time to reset the random-number generator to a random starting point. The generator is initially seeded with a value of 1. SEE ALSO
drand48(3C), rand(3C), random(3C) NOTES
Use of these interfaces should be restricted to only applications written on BSD platforms. Use of these interfaces with any of the system libraries or in multi-thread applications is unsupported. The spectral properties of rand() leave a great deal to be desired. drand48(3C) and random(3C) provide much better, though more elaborate, random-number generators. The low bits of the numbers generated are not very random; use the middle bits. In particular the lowest bit alternates between 0 and 1. SunOS 5.10 12 Feb 1993 rand(3UCB)
All times are GMT -4. The time now is 05:56 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy