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LessEqualThan[y]

is an operator form that yields x≤y when applied to an expression x.

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Scope  
Applications  
Properties & Relations  
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LessEqualThan

LessEqualThan[y]

is an operator form that yields x≤y when applied to an expression x.

Details

Examples

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Basic Examples  (3)

Check numeric order:

Wolfram Language code: LessEqualThan[3][2]

For symbolic expressions, the result is given as an inequality:

Wolfram Language code: LessEqualThan[y][x]

Select the numbers that are smaller than or equal to 10 in a list:

Wolfram Language code: Select[{0, 5, 10, 15}, LessEqualThan[10]]

Scope  (4)

Use LessEqualThan with numbers:

Wolfram Language code: LessEqualThan[10][6]

Use LessEqualThan with numeric Quantity objects:

Wolfram Language code: LessEqualThan[Quantity[1, "Hour"]][Quantity[50, "Minutes"]]

Use LessEqualThan with dates:

Wolfram Language code: LessEqualThan[Today][Yesterday]
Wolfram Language code: LessEqualThan[DateObject[{2015, 8, 1}, "Day", "Gregorian", -6.]][DateObject[{2015, 6, 1}, "Day", "Gregorian", -6.]]

Use symbolic values:

Wolfram Language code: LessEqualThan[5][x]
Wolfram Language code: LessEqualThan[x][5]

Applications  (2)

Find atomic masses of elements of atomic number 10 or less:

Wolfram Language code: EntityValue[EntityClass["Element", {"AtomicNumber" -> LessEqualThan[10]}], {"Entity", "AtomicMass"}]//SortBy[Last]

This is the eccentricity of the elliptical orbit of the Earth around the Sun:

Wolfram Language code: ecc = PlanetData[Entity["Planet", "Earth"], "Eccentricity"]

These are the planets whose eccentricity is smaller than or equal to that of the Earth:

Wolfram Language code: EntityValue[EntityClass["Planet", {"Eccentricity" -> LessEqualThan[ecc]}], "Eccentricity", "EntityAssociation"]

Properties & Relations  (1)

Compare the alternative notations:

Wolfram Language code: Select[{5, 10, 15, 20}, LessEqual[#, 10]&]
Wolfram Language code: Select[{5, 10, 15, 20}, LessEqualThan[10]]
Wolfram Language code: Select[LessEqualThan[10]][{5, 10, 15, 20}]
Wolfram Research (2015), LessEqualThan, Wolfram Language function, https://reference.wolfram.com/language/ref/LessEqualThan.html.

Text

Wolfram Research (2015), LessEqualThan, Wolfram Language function, https://reference.wolfram.com/language/ref/LessEqualThan.html.

CMS

Wolfram Language. 2015. "LessEqualThan." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/LessEqualThan.html.

APA

Wolfram Language. (2015). LessEqualThan. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/LessEqualThan.html

BibTeX

@misc{reference.wolfram_2026_lessequalthan, author="Wolfram Research", title="{LessEqualThan}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/LessEqualThan.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_lessequalthan, organization={Wolfram Research}, title={LessEqualThan}, year={2015}, url={https://reference.wolfram.com/language/ref/LessEqualThan.html}, note=[Accessed: 12-June-2026]}