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BigDecimal longValue() Method in Java
• Last Updated : 04 Dec, 2018

The java.math.BigDecimal.longValue() is an in-built function which converts this BigDecimal to a long value. This function discards any fractional part of this BigDecimal. The function returns only the lower-order 64 bits when the result of the conversion is too big to be represented as a long value.

Syntax:

`public long longValue()`

Parameters: This function accepts no parameters.

Return Value: This function returns the long value of this BigDecimal.

Examples:

```Input : 1987812456121.176
Output : 1987812456121

Input : "721111"
Output : 721111
```

Below programs illustrate the use of java.math.BigDecimal.longValue() method:

Program 1:

 `// Java program to illustrate``// longValue() method``import` `java.math.*;``import` `java.io.*;`` ` `class` `GFG {``    ``public` `static` `void` `main(String[] args)``    ``{``        ``// Creating 2 BigDecimal Objects``        ``BigDecimal b1, b2;`` ` `        ``// Assigning values to b1, b2``        ``b1 = ``new` `BigDecimal(``"1987812456121.176"``);``        ``b2 = ``new` `BigDecimal(``"721111"``);`` ` `        ``// Displaying their respective Long Values``        ``System.out.println(``"The Long Value of "` `+ b1 +``        ``" is "` `+ b1.longValue());``        ``System.out.println(``"The Long Value of "` `+ b2 + ``        ``" is "` `+ b2.longValue());``    ``}``}`
Output:
```The Long Value of 1987812456121.176 is 1987812456121
The Long Value of 721111 is 721111
```

Note: Information regarding the overall magnitude and precision of large this BigDecimal values might be lost during the course of conversion by this function. As a consequence, a result with the opposite sign might be returned.

Program 2: Below program illustrates a scenario when the function returns a result with the opposite sign.

 `// Java program to illustrate``// longValue() method``import` `java.math.*;``import` `java.io.*;`` ` `class` `GFG {``    ``public` `static` `void` `main(String[] args)``    ``{``        ``// Creating 2 BigDecimal Objects``        ``BigDecimal b1, b2;`` ` `        ``// Assigning values to b1, b2``        ``b1 = ``new` `BigDecimal(``"267694723232435121868"``);``        ``b2 = ``new` `BigDecimal(``"72111184561789104423"``);`` ` `        ``// Displaying their respective Long Values``        ``System.out.println(``"The Long Value of "` `+ b1 + ``        ``" is "` `+ b1.longValue());``        ``System.out.println(``"The Long Value of "` `+ b2 + ``        ``" is "` `+ b2.longValue());``    ``}``}`
Output:
```The Long Value of 267694723232435121868 is -9006437873208152372
The Long Value of 72111184561789104423 is -1675791733049102041
```

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