# BigInteger setBit() Method in Java

• Last Updated : 03 Mar, 2022

The java.math.BigInteger.setbit(index) method returns a Big-integer whose value is equivalent to this Big-integer with the designated bit set. The method computes (this | (1<<n)). The bit at index n of binary representation of Big-integer will be set means converted to 1.

Syntax:

`public BigInteger setbit(int n)`

Parameters: The method takes one parameter n which refers to the index of the bit that is needed to be set.
Return Value: The method returns the BigInteger value after setting the bit position n.
Exceptions: The method might throw an ArithmeticException when n is negative..

Examples

```Input: value = 2300 index = 1
Output: 2302
Explanation:
Binary Representation of 2300 = 100011111100
bit at index 1 is 0 so set the bit at index 1
Now Binary Representation becomes 100011111110
and Decimal equivalent of 100011111110 is 2302

Input: value = 5482549 index = 1
Output: 5482551```

Below program illustrate the setBit(index) method of BigInteger:

## Java

 `// Program to demonstrate setBit() method of BigInteger` `import` `java.math.*;` `public` `class` `GFG {` `    ``public` `static` `void` `main(String[] args)``    ``{` `        ``// Creating BigInteger object``        ``BigInteger biginteger = ``new` `BigInteger("``2300``");` `        ``// Creating an integer i for index``        ``int` `i = ``1``;` `        ``// Calling setBit() method on bigInteger at index i``        ``// store the return BigInteger``        ``BigInteger changedvalue = biginteger.setBit(i);` `        ``String result = "After applying setBit at index " +``        ``i + " of " + biginteger+ " New Value is " + changedvalue;` `        ``// Displaying the result``        ``System.out.println(result);``    ``}``}`

Output:

`After applying setBit at index 1 of 2300 New Value is 2302`

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