how does plus works in Java

In Java, the + operator is used to perform addition. When the + operator is used with two operands, it adds the operands and returns the result.

For example, the following code adds two int variables and assigns the result to a third int variable:

int a = 2;
int b = 3;
int c = a + b; // c is now 5

The + operator can also be used with other numeric data types, such as float, double, and long. For example:

float d = 2.5f;
float e = 3.0f;
float f = d + e; // f is now 5.5

double g = 2.5;
double h = 3.0;
double i = g + h; // i is also 5.5

In these examples, the + operator adds the operands and returns the result as the same data type as the operands.

In addition to its use as an arithmetic operator, the + operator can also be used to concatenate strings in Java. When the + operator is used with two string operands, it concatenates the operands and returns the result as a new string.