What is the difference between type casting and type conversion in C++ or Java?

Question

What is the difference between typecasting and typeconversion in C++ or Java ?

Answer 1

Type conversion:

double value = 3; // implicit conversion to double value 3.0
int nValue = 3.14156; // implicit conversion to integer value 3

Casting is a request by the programmer to do an explicit type conversion.

int nValue = 10;
double dvalue = double(nValue); // explicit type casting