1)Use of Little
‘Little’ is used in the sense of ‘not much’ or ‘hardly any’ or ‘not enough’ before singular uncountable noun to express quantity. It has a negative meaning.
Example
He has little money.
Meaning: He has not much/ negligible amount of money.
2)Use of Little
‘A Little’ is used in the sense of ‘a small amount’ before singular uncountable noun to express quantity. It has a positive meaning.
Example
He has a little money.
Meaning: He has a small amount of money.
3)Use of Little
‘The Little’ is used in the sense of ‘not much, but all there is’/ ‘the amount is small but all’/ ‘the small amount or quantity, but all’ before singular uncountable noun to express quantity. It has both positive and negative meanings.
Example
I spent the little money I had.
Meaning: I spent all the money I had. (Positive)
The money I had was not much. (Negative)