Null vs. Zero: Know the Difference
By Shumaila Saeed || Updated on December 25, 2023
Null is the absence of a value or non-existence, while zero is a numeric value representing nothingness but is still a valid number.
Key Differences
Null signifies an absence or lack of value, often used in computing and data contexts to represent 'nothing' or 'no value'. Zero, on the other hand, is a numeric value, representing a count or amount of nothing, but is still a quantifiable number.
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In programming, Null is used to denote an uninitialized or undefined state of a variable, implying that it points to nothing. Zero is a specific integer value, often used in mathematical operations, and represents the lowest non-negative integer.
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Dec 09, 2023
When considering databases, Null indicates a field that is empty or not filled in, suggesting unknown or inapplicable data. Zero in a database field indicates a recorded value, explicitly defining the quantity as none.
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Dec 09, 2023
In logical contexts, Null is often used to represent the absence of a truth value, neither true nor false. Zero, in binary or logical terms, typically represents 'false' but is still a determinate value.
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Philosophically, Null might be used to describe non-existence or a void, a concept with no physical or abstract representation. Zero, while also symbolizing emptiness, is a fundamental number in mathematics, essential for the binary system and arithmetic operations.
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Comparison Chart
Definition
Represents an absence of value or non-existence.
A numeric value representing nothingness.
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In Computing
Indicates an uninitialized or undefined variable.
A specific numeric value, often used as a placeholder.
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In Mathematics
Not applicable as it is non-numeric.
The integer preceding one, central in number systems.
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Logical Implication
Can imply an unknown, undefined, or inapplicable state.
Often represents 'false' in binary logic.
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In Databases
A field with Null has no data or is left blank.
A field with Zero has a recorded value of none.
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Null and Zero Definitions
Null
In programming, Null refers to a pointer that doesn't point to any object.
The script failed because the variable was Null.
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Zero
In mathematics, Zero is the integer before one.
Subtracting five from five equals zero.
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Null
In logic, Null can imply neither true nor false.
The proposition's truth value was Null.
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Zero
Zero is used as a placeholder in numerical systems.
The number one thousand is written with two zeros.
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Zero
A cardinal number indicating the absence of any or all units under consideration.
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Null
(Mathematics) Of or relating to a set having no members or to zero magnitude.
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Zero
(Informal) One having no influence or importance; a nonentity
A manager who was a total zero.
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Null
(computing) The null character; the ASCII or Unicode character (␀), represented by a zero value, which indicates no character and is sometimes used as a string terminator.
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Null
(computing) The attribute of an entity that has no valid value.
Since no date of birth was entered for the patient, his age is null.
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Zero
(Informal) Not any; no
"The town has ... practically no opportunities for amusement, zero culture" (Robert M. Adams).
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Zero
Limited in horizontal visibility to no more than 55 meters (180 feet).
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Zero
(Linguistics) Of or relating to a morpheme that is expected by an established, regular paradigm but has no spoken or written form. Moose has a zero plural; that is, its plural is moose.
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Zero
The cardinal number occurring before one and that denotes no quantity or amount at all, represented in Arabic numerals as 0.
The conductor waited until the passenger count was zero.
A cheque for zero dollars and zero cents crashed the computers on division by zero.
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Zero
The numeric symbol that represents the cardinal number zero.
In unary and k-adic notation in general, zero is the empty string.
Write 0.0 to indicate a floating point number rather than the integer zero.
The zero sign in American Sign Language is considered rude in some cultures.
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Zero
The digit 0 in the decimal, binary, and all other base numbering systems.
One million has six zeroes.
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Zero
Nothing, or none.
The shipment was lost, so they had zero in stock.
He knows zero about humour.
In the end, all of our hard work amounted to zero.
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Zero
The value of a magnitude corresponding to the cardinal number zero.
The electromagnetic field does not drop all of the way to zero before a reversal.
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Zero
The point on a scale at which numbering or measurement originates.
The temperature outside is ten degrees below zero.
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Zero
(mathematics) A value of the independent variables of a function, for which the function is equal to zero.
The zeroes of a polynomial are its roots by the fundamental theorem of algebra.
The derivative of a continuous, differentiable function that twice crosses the axis must have a zero.
The nontrivial zeros of the Riemann zeta function may all lie on the critical line.
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Zero
The additive identity element of a monoid or greater algebraic structure, particularly a group or ring.
Since a commutative zero is the inverse of any additive identity, it must be unique when it exists.
The zero (of a ring or field) has the property that the product of the zero with any element yields the zero.
The quotient ring over a maximal ideal is a field with a single zero element.
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Null
Of no legal or binding force or validity; of no efficacy; invalid; void; nugatory; useless.
Faultily faultless, icily regular, splendidly null,Dead perfection; no more.
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Zero
(slang) A person of little or no importance.
They rudely treated him like a zero.
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Zero
(military) A Mitsubishi A6M Zero, a long range fighter aircraft operated by the Japanese Navy Air Service from 1940 to 1945.
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Zero
A setting of calibrated instruments such as a firearm, corresponding to a zero value.
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Null
Unassigned or meaningless; - a special value given to variables, especially pointers or logical variables, indicating that it is meaningless and cannot be used in computation; as, an uninitialized pointer in "C" is given a null value. The actual value that is stored in memory to indicate the null condition may vary with the computer language used.
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Zero
(finance) A security which has a zero coupon (paying no periodic interest).
The takeovers were financed by issuing zeroes.
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Zero
(meteorology) Of a cloud ceiling, limiting vision to 50 feet (15 meters) or less.
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Zero
(meteorology) Of horizontal visibility, limited to 165 feet (50.3 meters) or less.
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Zero
(linguistics) Present at an abstract level, but not realized in the surface form.
The stem of "kobieta" with the zero ending is "kobiet".
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Null
A quantity of no importance;
It looked like nothing I had ever seen before
Reduced to nil all the work we had done
We racked up a pathetic goose egg
It was all for naught
I didn't hear zilch about it
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Zero
(transitive) To set a measuring instrument to zero; to calibrate an instrument scale to valid zero.
Zero the fluorometer with the same solvent used in extraction.
George parked in space 34, zeroed the trip meter, closed and locked his car, then went back to the guard shack.
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Zero
To change a memory location or range to values of zero; to set a variable in a computer program to zero.
Results were inconsistent because an array wasn’t zeroed during initialization.
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Zero
(transitive) To cause or set some value or amount to be zero.
They tried to zero the budget by the end of the quarter.
The bill was over $400, but the server zeroed it out as a gesture of gratitude.
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Null
Null can indicate an unknown or inapplicable information.
The survey response was marked as Null.
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Null
Null is used to denote that a data field is empty.
The database entry for the address was Null.
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Zero
The point from which the graduation of a scale, as of a thermometer, commences.
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Zero
Fig.: The lowest point; the point of exhaustion; as, his patience had nearly reached zero.
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Zero
A quantity of no importance;
It looked like nothing I had ever seen before
Reduced to nil all the work we had done
We racked up a pathetic goose egg
It was all for naught
I didn't hear zilch about it
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Oct 19, 2023
Zero
A mathematical element that when added to another number yields the same number
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Zero
Adjust (as by firing under test conditions) the zero of (a gun);
He zeroed in his rifle at 200 yards
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Zero
Indicating the absence of any or all units under consideration;
A zero score
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Zero
Having no measurable or otherwise determinable value;
The goal is zero population growth
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Zero
Zero is a number representing no quantity or amount.
The team scored zero goals.
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Zero
Zero can represent the lowest point or starting point.
The thermometer read zero degrees.
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Zero
In binary, Zero often represents the state 'off' or 'false'.
The binary code started with two zeros.
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Repeatedly Asked Queries
Is Zero a positive or negative number?
Zero is neither positive nor negative; it's neutral.
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Dec 09, 2023
In databases, what does Null signify?
It signifies an empty or unknown field.
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Can Zero be divided?
Other numbers can be divided by zero, but the result is undefined.
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Is Zero important in calculus?
Yes, particularly in limits and derivatives.
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Can Null be used in arithmetic operations?
No, Null cannot be used in arithmetic as it's not a number.
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Does Zero have a place in number theory?
Yes, it's fundamental in number theory.
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Is Null the same as an empty string?
In some contexts, they are treated similarly, but they are not the same.
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Can Zero be a starting point in indexing?
Yes, especially in programming languages like C.
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In programming, how is Zero used?
It's often used as a default value or a false condition.
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How is Null treated in boolean logic?
It's usually treated as undefined or unknown.
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Is Null allowed in primary keys in databases?
No, primary keys cannot be Null.
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Dec 09, 2023
Why is Zero important in computer science?
It's essential in binary coding and data representation.
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Can Null be converted to a number?
No, Null cannot be directly converted to a number.
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Dec 09, 2023
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Written by
Shumaila SaeedShumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.
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