Yes, but only for specific years. The 1964 contains 90% silver, and those 1965-70 are 40% silver. Anything 1971-present is mostly copper and only worth face value.
A 1969 silver Kennedy half dollar is worth $5 inn perfect condition. The value of the silver is worth $2.87.
The 1969 Kennedy half dollar is only 40% silver with a value about $3.25
A 2002-S silver proof Kennedy has an average retail value of $18.00.
If the coin is a US Kennedy half dollar dated 1974 it has no silver in it and is face value.
If the coin is a 1996-S Silver Proof Kennedy Half dollar, average retail value is $12.00 to $15.00
About $6 for its silver content
The coin is 40% silver and has a value of about $2.00 only for the silver.
For a circulated 1966 Kennedy half the value is only for silver about $1.00
The coin is a 40% silver Kennedy half dollar most are valued only for the silver, about $6.00
The coin has no silver and is just face value, spend it.
If you mean a 1998 Kennedy half dollar, the coin has no silver in it and is worth face value.
The coin is only 40% silver and has a value of $2.73 only the 1964 Kennedy half dollar was 90% silver.