What is the function of Dynamic arrays?

 Dynamic arrays are the array type that defines their sizes at runtime or according to the data     entered. 

 The dynamic arrays are declared and defined as shown below:

var

wishes : array of string; 

begin

SetLength(wishes, 3); 

end;

• SetLength is a routine that is used to set the array size according to the string entered. 
•  The size of the string or the input is defined at runtime that is why it is called dynamic arrays. 
• The array size can be changed and decreased or increased according to the requirements. 
• Dynamic arrays starts with an index 0 and it can grow according to the need of the input.