Sum of squares of first N natural numbers
You are given an integer 'N'. You need to find the sum of squares of the first 'N' natural numbers.
For example:
If 'N' = 4. You need to return 1^2 + 2^2 + 3^2 + 4^2 = 30.
Input Format:
The first line of input contains a single integer 'T', representing the number of test cases or queries to be run.
The first and the only line of each test case contains an integer 'N'.
Output Format:
For each test case, return the sum of squares of the first 'N' natural numbers in a single line.
Constraints:
1 ≤ T ≤ 10^4
1 ≤ N ≤ 5*10^5
where 'T' is the number of test cases and 'N' is the given number.
Time Limit: 1 sec.
Note:
You are not required to print the expected output, it has already been taken care of. Just implement the function.
girish jagtap
5mo
int in=4;
int op=IntStream.rangeClosed(1, in).map(x->x*x).sum();
System.out.println(op);
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