uppercase first character in a variable with bash

Question

I want to uppercase just the first character in my string with bash.

foo=\"bar\";

//uppercase first character

echo $foo;

should print \"B

Answer 1

Here is the "native" text tools way:

#!/bin/bash

string="abcd"
first=`echo $string|cut -c1|tr [a-z] [A-Z]`
second=`echo $string|cut -c2-`
echo $first$second