Unless it's a wide-rim variety, it's only worth one dollar (assuming the question is about the value).
A 1979 US dollar coin is still worth one dollar.
It's still only a dollar
With a date of 1979 the coin has no silver in it. 1969 was the last 40% silver circulating US half dollar. The coin is worth 50 cents.
That's a Susan B. Anthony dollar coin, and it's worth one dollar.
A 1979 Susan B. Anthony coin is worth 1 dollar (face value) still to this day unless in a condition that is UNC.
A 1979 US dollar coin is still worth one dollar.
The US $1 dollar coin dated 1979 has no silver in it, they are still in circulation if this coin is from pocket change spend it.
It's still only a dollar
From your description the coin is a common Susan B. Anthony dollar (1979-1981 & 1999) that is in circulation today. It's just a dollar coin, spend it.
With a date of 1979 the coin has no silver in it. 1969 was the last 40% silver circulating US half dollar. The coin is worth 50 cents.
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
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That's a Susan B. Anthony dollar coin, and it's worth one dollar.
A 1979 Susan B. Anthony coin is worth 1 dollar (face value) still to this day unless in a condition that is UNC.
The US issued no silver coins of any type in 1979, but if you mean a 1979 SBA dollar coin, just spend it.
Susan B. Anthony, thus the coin is name the Susan B. Anthony dollar.
In 1979, the dollar coin issued by the US was the Susan B. Anthony, which has no silver content and no real collector's value, so is a "spender".