Generating 10 random numbers in a range in an awk script - awk

Question

So I'm trying to write an awk script that generates passwords given random names inputted from a .csv file. I'm aiming to do first 3 letters of last name, number of characters in the fourth field, then a random number between 1-200 after a space. So far I've got the letters and num of characters fine, but am having a hard time getting the syntax in my for loop to work for the random numbers. Here is an example of the input:
Danette,Suche,Female,"Kingfisher, malachite"
Corny,Chitty,Male,"Seal, southern elephant"
And desired output:
Suc21 80
Chi23 101
For 10 rows total. My code looks like this:
BEGIN{
FS=",";OFS=","
}
{print substr($2,0,3)length($4)
for(i=0;i<10;i++){
echo $(( $RANDOM % 200 ))
}}
Then I've been running it like
awk -F"," -f script.awk file.csv
But it only shows the 3 characters and length of fourth field, no random numbers. If anyone's able to point out where I'm screwing up it would be much appreciated , thanks guys

Answer 1

You can use rand() to generate a random number between 0 and 1:
awk -F, '{print substr($2,0,3)length($4),int(rand()*200)+1}' file.csv

Answer 2

BEGIN{
FS=",";OFS=","
}
{print substr($2,0,3)length($4)
for(i=0;i<10;i++){
echo $(( $RANDOM % 200 ))
}}
There is not echo function defined in GNU AWK, if you wish to use shell command you might use system function, however keep in mind that it does return status code and does print what said command output, without ability to alter it, so you need to design command so you get desired output from it.
Let file.txt content be
A
B
C
then
awk '{printf "%s ",$0;system("echo ${RANDOM}%200 | bc")}' file.txt
might give output
A 95
B 139
C 1
Explanation: firstly I use printf so no newline is appended automatically, I output whole line followed by space, then I execute command which does output random value in range
echo ${RANDOM}%200 | bc
it does simply ram RANDOM followed by %200 into calculator, which does output result of such action.
If you are not dead set on using RANDOM variable, then rand function, might be use without hassle.
(tested with gawk 4.2.1 and bc 1.07.1)