How can I generate 2 numbers that equal a read value?-CodePudding

I am trying to create a bash script where I ask for a users age and then the script returns two numbers that sum to their age.

I tried

read -p "Enter your age: " age
echo $RANDOM $RANDOM="$age"

When running this it printed random numbers that do not equal the age that the user inserted. I was expecting it to print two random numbers that added up to their age.

CodePudding user response：

#!/bin/bash

# Ask the user for their age
echo -n "Enter your age: "
read age

# Generate two random numbers that sum up to the user's age
num1=$((RANDOM % age))
num2=$((age - num1))

# Print the two numbers
echo "The numbers are: $num1 and $num2"

The script above first asks for the user's age using the echo and then reads and saves the age using the read. It will then print two random numbers that when added together equals to the age that the user entered.

CodePudding user response：

Well, you can't use 2 random numbers if their sum must be equal to the given age; one is enough:

read -p "Enter your age: " age

rand=$(( (RANDOM % (age-1))   1 ))  # =>  in the range [1..age-1]

echo "$rand   $(( age - rand )) = $age"