The **`subtract` method** of the `BigInteger` class subtracts the passed `BigInteger` object value from the called `BigInteger` object value.
# 
#  Syntax

```java
public BigInteger subtract(BigInteger val)
```
# 
#  Argument
This method takes a `BitInteger` object as an argument. 
##
## Return value 

```
this - val
```

This method returns a `BitInteger` object. The value of the returned `BigInteger` object is the difference between the current `BigInteger` object value and the `BigInteger` argument's value.
##
## Code

The example below demonstrates the use of the `subtract` method:




import java.math.BigInteger;

class BigIntegerSubtractExample {
    public static void main( String args[] ) {
        BigInteger val1 = new BigInteger("1000");
        BigInteger val2 = new BigInteger("100");
        BigInteger result = val1.subtract(val2);
        System.out.println(result);
    }
}

# 
## Explanation 

In the code above:

* In line number 1, we import the `BigInteger` class.
```
import java.math.BigInteger;
```

* In lines number 5 and 6, we create two `BigInteger` 
 objects, `val1` with the value `1000` and `val2` with `100`. 

```
BigInteger val1 = new BigInteger("1000");
BigInteger val2 = new BigInteger("100");
```
* In line number 7, we call the `subtract` method on the `val1` object with `val2` as an argument. This method call will return a `BigInteger`, which has a value equal to the difference between the `val1` and `val2`.

```
BigInteger result = val1.subtract(val2); //900
```

What is the BigInteger.subtract method in Java?

Syntax

Argument

Return value

Code

Explanation