How to read (command) without enter in Linux bash shell?

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By default the read command wait for a Enter Key to complete the command. But if  you –n 1 option it will not wait for the enter key. Once it counts one(n=1) key press in the standard input it will come out and assign the value to the variable.

Normal read command with enter

read -p "Are you Sure?" ans

Are you Sure?y

$ echo $ans

Y

Read command without enter

read -p " Are you Sure?" -n 1 ans

Are you Sure?y$

$ echo $ans

y

How to implement in shell script?

proceed=$(bash -c 'read -p " Are you Sure ? " -n 1 ans;echo "$ans"')

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