--- 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 :::