Convert to uppercase in shell
awk, shell, uppercase
Solution
If you want to store the result of `a` back in `a`, then you can do use command substitution:
read a;
a=$(echo $a | tr 'a-z' 'A-Z')
echo $a
Problem
I am reading a character from keyboard and converting it to uppercase and then displaying the character again. But the following code produces an error: ``` read a; a=echo $a | tr 'a-z' 'A-Z' echo $a ``` I also tried this: ``` read option; eval $(awk -v option=$option '{print "a="toupper(option);}') echo $a ```