So I'm just working on some simple arithmetic code. Here's what I got:
echo "The number should be 2";
declare -i input added
input= date +%w
let added="input/2"
echo "$added"
when I run it the output is
4
0
I'm trying to just get 2. What the heck am I doing wrong?
The problem is how you are creating the input variable. It is just executing the command, but not assigning the result to input. Instead, do:
input=$(date +%w)
This will assign the output of the date command to input.
Alternate way:
#Just echo the result:
expr $(date +%w) / 2
#store the result into a variable:
input=$(expr $(date +%w) / 2)
echo $input
2
One thing to note is that in Bash you generally can't have spaces around the equal sign.
An alternate syntax to using let is to use $(()) or (()):
var2=$((var1 / 2))
Or
((var2 = var1 / 2))
Inside the double parentheses, you can use spaces and you can omit the dollar sign from the beginning of variable names.
