how to calculate average in bash?

Question

hello i made this program in bash script i need to calculate average i tried many times but it wont work

#!/bin/bash

declare -A grades

for (( c=1 ; c<=5 ; c++))
{
    read -p "enter name,course grade of 5: " course grade
    grades[$course]=$grade
}

echo "your grades is"
echo ${grades[@]}
echo
echo "this is all your courses name and grades"

for  c in ${!grades[*]}
{
    echo " $c   : ${grades[$c]}"
}
unset mygrades

Answer 1

hello i made this program in bash script i need to calculate average i tried many times but it wont work

#!/bin/bash

declare -A grades

for (( c=1 ; c<=5 ; c++))
{
    read -p "enter name,course grade of 5: " course grade
    grades[$course]=$grade
}

echo "your grades is"
echo ${grades[@]}
echo
echo "this is all your courses name and grades"

for  c in ${!grades[*]}
{
    echo " $c   : ${grades[$c]}"
}
unset mygrades