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What are the three dots in Java?
Educative Answers TeamThe three dots (...) are used in a function’s declaration as a parameter. These dots allow zero to multiple arguments to be passed when the function is called. The three dots are also known as var args.
Code 1
The following code uses two arguments in a function call.
class main {
public static int function (int ... a) {
int sum = 0;
for (int i : a)
sum += i;
return sum;
}
public static void main( String args[] ) {
int ans = function(1,1);
System.out.println( "Result is "+ ans );
}
}Code 2
The following code uses three arguments in the same function defined above. This is possible because of the three dots parameter.
class main {
public static int function (int ... a) {
int sum = 0;
for (int i : a)
sum += i;
return sum;
}
public static void main( String args[] ) {
int ans = function(1,1,1);
System.out.println( "Result is "+ ans );
}
}RELATED TAGS
dots
operator
java
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