What range of numbers does the byte data type represent in programming?

In Java, the byte data type is an 8-bit signed integer. Its value range is from -128 to 127 inclusive. This is because one bit is used for the sign of the number, and the remaining seven bits are for the value.

Example usage:

byte b = 100;
System.out.println(b); // Will output 100

b = -128;
System.out.println(b); // Will output -128

// A value outside the range will cause a compile error
// byte c = 130; // Error