Camel Case custom function is used to change the text in the cell to CamelCase. For eg. if the text in the cell is "this is a good sample" after using the function the text will be "This Is a Good Sample".
=toCamelCase(<<CELL#>>)

There is also another function  called toCamelCaseRange that will replace the current text with a Camel Case formatted text for a range of selected Cells.
Select a range of Cells on the sheet and apply the toCamelCaseRange function to change the text in the selected Cells to CamelCase.