A new feature was introduced by JDK 7 which allows writing numeric literals using the underscore character. Basically, they are broken to enhance readability. This feature enables us to separate groups of digits in numeric literals, which improves the readability of code. For instance, if our code contains numbers with many digits, we can use an underscore character to separate digits in groups of three, similar to how we would use a punctuation mark like a comma, or a space, as a separator. Let us explore further with an example
Example
Java
// Java Program to Illustrate Different Ways of Usage// of Underscore in Numeric Literals// Main classclass GFG { // Main driver method public static void main(String[] args) throws java.lang.Exception { // Declaring and initializing values of // integer, long, float and double datatype // Integer literal int inum = 1_00_00_000; // Long literal long lnum = 1_00_00_000; // Float literal float fnum = 2.10_001F; // Double literal double dnum = 2.10_12_001; // Printing and displaying values on console System.out.println("inum:" + inum); System.out.println("lnum:" + lnum); System.out.println("fnum:" + fnum); System.out.println("dnum:" + dnum); }} |
inum:10000000 lnum:10000000 fnum:2.10001 dnum:2.1012001
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