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**ISLOWER(**// string //**)**

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| **ISLOWER** | Returns whether the //string// passed to it contains a lower case alphabetic character. |
| //string// | The label of the string to test. If the //string// contains more than one character, only the first character is tested. |

The ISLOWER procedure returns TRUE if the //string// passed to it is a lower case letter and false otherwise. This is independent of the language and collation sequence. This procedure requires that CLACASE has been set in the application's environment file or through the LOCALE statement.

| **Return Data Type:** | LONG |

**Example:**

**SomeString STRING(1)**

** CODE   **

** SomeString = 'a'         !ISLOWER returns true**

** IF ****ISLOWER****(SomeString) **

**  X#= MESSAGE('Lower case string')**

** END**

** SomeString = 'A'         !ISLOWER returns false**

** IF ****ISLOWER****(SomeString) **

**  X#= MESSAGE('Lower case string')**

** ELSE**

**  X#= MESSAGE('Not lower case string')**

** END**

**See Also:**

[[isupper  return upper case character .htm|ISUPPER]]

[[isalpha  return alphabetic character .htm|ISALPHA]]

[[numeric  return numeric string .htm|NUMERIC]]

[[locale  load environment file .htm|LOCALE]]

[[internationalization.htm|Environment Files]]