Webb16 feb. 2015 · I know how to get a random item from an array like that: declare -a ARRAYISO=(100 200 400 800) echo ${ARRAYISO["$[RANDOM % ${#ARRAYISO[@]}]"]} I … WebbThe rand() function returns a pseudo-random integer in the range 0 to RAND_MAX inclusive (i.e., the mathematical range [0, RAND_MAX]). The srand() function sets its argument as the seed for a new sequence of pseudo-random integers to be returned by rand(). These sequences are repeatable by calling srand() with the same
How to use random number in shell script? - Stack Overflow
WebbThe most basic (and hence portable) idea is to generate a random bitstring just long enough. There are different ways of generating a random bitstring, either using bash's … Webb21 aug. 2024 · The while loop is another popular and intuitive loop you can use in bash scripts. The general syntax for a while loop is as follows: while [ condition ]; do [COMMANDS] done For example, the following 3x10.sh script uses a while loop that will print the first ten multiples of the number three: eye of the storm tabard
Bash Reference Manual
Webb19 maj 2024 · The ability to use positional parameters—otherwise known as arguments—to specify data to be used as values for variables in the scripts is one method for accomplishing this. Another is the use of options and option arguments. This article explores these two methods for getting data into the script and controlling the script's … Webb16 feb. 2024 · In Bash, you can get this with $ ( (32768 - $ ( (32768 % b)) )) The following code will generate a random number in the range 0..b (not inclusive of b ). b=$1 m=$ ( … Webb18 juni 2024 · $RANDOM is a bash function (not a constant) that returns a random signed 16 bit integer (from 0 through 32767). You can use modulo to put some bounds on it. This line will output a random int between 0 - 9: $ echo $( ( $RANDOM % 10 )) If you want to generate a random int between 1 - 10: $ echo $( ( $RANDOM % 10 + 1 )) eye of the storm teacher