This is a beginner&#39;s question.

1. What&#39;s the difference between `^` and `**`?
For example:
     
   

        2 ^ 10
        
        [1] 1024
        
        2 ** 10
        
        [1] 1024

2. Is there a function such as `power(x,y)`?




Raise to power in R

I have this Bash script and I had a problem in line 16.
How can I take the previous result of line 15 and add
it to the variable in line 16?

    #!/bin/bash

    num=0
    metab=0

    for ((i=1; i&lt;=2; i++)); do
        for j in `ls output-$i-*`; do
            echo &quot;$j&quot;

            metab=$(cat $j|grep EndBuffer|awk &#39;{sum+=$2} END { print sum/120}&#39;) (line15)
            num= $num + $metab   (line16)
        done
        echo &quot;$num&quot;
     done



All Mathematical Expressions Solutions on Gang of Coders

Total of 2 Mathematical Expressions Solutions

Raise to power in R

How can I add numbers in a Bash script?