Answer:
Following are the declaration with the datatypes
int age; // variable age of int types
boolean gender; // variable gender of boolean type
double height; // variable height of double types
int weight; // variable weight of int types
Explanation:
Here we writing a personal program that store the age,gender,height,weight.
age of type integer because age are in integer value.
gender is type of boolean because boolean is return true or false .
height is type of double because height may be in floating value.
weight is type of integer because weight are in integer value.