elasticsearch/docs/reference/query-languages/esql/functions-operators/conditional-functions-and-expressions.md

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applies_to: stack: ga serverless: ga navigation_title: "Conditional functions and expressions" mapped_pages:

• https://www.elastic.co/guide/en/elasticsearch/reference/current/esql-functions-operators.html#esql-conditional-functions-and-expressions ---

{{esql}} conditional functions and expressions [esql-conditional-functions-and-expressions]

Conditional functions return one of their arguments by evaluating in an if-else manner. {{esql}} supports these conditional functions:

:::{include} ../_snippets/lists/conditional-functions-and-expressions.md :::

:::{include} ../_snippets/functions/layout/case.md :::

:::{include} ../_snippets/functions/layout/coalesce.md :::

:::{include} ../_snippets/functions/layout/greatest.md :::

:::{include} ../_snippets/functions/layout/least.md :::