Big numbers BigInteger and BigDecimal in JAVA

BigInteger and BigDecimal are existing classes in the java. math package. The former represents an integer, and the latter represents a floating point.

Why use big numbers?

1) BigInteger: an integer of any precision is supported. It can accurately represent an integer of any size without any information loss During computation.

2) BigInteger: It can accurately represent decimal places of any precision without any information loss during the operation.

Note: you cannot directly use symbols such as + or-to use large numbers. For example:

Import java. math. bigInteger; public class Main {public static void main (String [] args) {int a = 231, B = 423, c = 1393; BigInteger x, y, z, ans; x = BigInteger. valueOf (a); y = BigInteger. valueOf (B); z = BigInteger. valueOf (c); ans = x. add (y); // add System. out. print (ans + ""); ans = z. divide (y); // division operation System. out. print (ans + ""); ans = x. mod (z); // modulo operation System. out. print (ans + ""); if (ans. compareTo (x) = 0) System. out. println ("1 ");}}

Calculation Result: 654 3 231 1

You can use the following methods:
BigInteger add (BigInteger other)
BigInteger subtract (BigInteger other)
BigInteger multiply (BigInteger other)
BigInteger divide (BigInteger other)
BigInteger mod (BigInteger other)
Int compareTo (BigInteger other)
Static BigInteger valueOf (long x)

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