Number of input and output field

Number of input field	:	One
Number of output field	:	One

This transformation function is used to replace a portion of the input text with specific characters.
The parameter string is in the form of :
Replacement Char,Begin Position,Length

• Replacement Char
  The character used to replace the specified portion of the text.
• Begin Position
  The starting position in the input text where the replacement begins.
• Length
  The number of characters to be replaced.