The difference between Nonnegative and Nonzero
When used as nouns, nonnegative means any value that is not negative, whereas nonzero means a quantity which is not zero.
When used as adjectives, nonnegative means (of a quantity) not negative, whereas nonzero means not equal to zero.
check bellow for the other definitions of Nonnegative and Nonzero
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Nonnegative as an adjective (mathematics):
(of a quantity) Not negative; either zero or positive
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Nonnegative as a noun:
Any value that is not negative.
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Nonzero as an adjective (mathematics, of a quantity):
Not equal to zero.
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Nonzero as a noun:
A quantity which is not zero.
Examples:
"The function has 1074 nonzeros."