Leq in LaTeX

The LaTeX command for leq (≤) is \leq (less than or equal).

\leq

Relations · Unicode ≤ (U+2264) · no package needed

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Which command should you use?

Command	Package	Use it when
`\leq` recommended	none	Less than or equal; \le is the same command.
`\leqslant`	`amssymb`	Slanted form, usual in French and Russian texts.
`\nleq`	`amssymb`	Not less than or equal.
`\lesssim`	`amssymb`	Less than up to a constant.

Table 1. Ways to write leq in LaTeX. Every line was compiled with pdfLaTeX (TeX Live 2026) loading only the package shown.

Common mistake. <= typed in a formula prints a less-than sign followed by an equals sign, not a single symbol.

How to type Leq

Write \leq inside math mode, that is between $…$ for inline math or in a \[ … \] or equation block for display math. It is part of core LaTeX math, so no extra package is required.

Example

$0 \leq x \leq 1$

0 \leq x \leq 1

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Often confused with

Leqslant \leqslant (⩽): slanted leq
Geq \geq (≥): greater than or equal

Related Relations symbols

\triangleq\lessapprox\gtrapprox=\neq<>\geq\leqslant\geqslant\ll\gg\equiv\sim

Relation symbols in LaTeX: the full table or search all 350+ LaTeX symbols.

FAQ

How do you write leq (≤) in LaTeX?

Use \leq in math mode; it needs no extra package. For example, $0 \leq x \leq 1$.

Which package provides \leq?

None: \leq is built into LaTeX, so no extra package is required.

What is the most common mistake with leq in LaTeX?

<= typed in a formula prints a less-than sign followed by an equals sign, not a single symbol.