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couting occurences of a character inside a string and assigning it to a variable

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# 1  
Old 08-03-2011
couting occurences of a character inside a string and assigning it to a variable
echo "hello123" | tr -dc '[0-9]' | wc -c

using this command i can count the no of times a number from 0-9 occurs in the string "hello123"
but how do i save this result inside a variable?

if i do
x= echo "hello123" | tr -dc '[0-9]' | wc -c

that does not work...plz suggest..thanks
# 2  
Old 08-03-2011
Code:
x=`echo "hello123" | tr -dc '[0-9]' | wc -c`

And don't put spaces around the equal sign.
This User Gave Thanks to yazu For This Post:
arindamlive
# 3  
Old 08-03-2011
thanks so much...works perfectly...thanks a lot Smilie
# 4  
Old 08-03-2011
Code:
$ echo "abc123" | fold -w 1 | grep -c "[0-9]"
3

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