Nth Fibonacci (iterative)
Java
Medium
5 views
Problem Description
Task: return nth Fibonacci number (0-indexed) using iterative loop.
Output Format
Return value
Constraints
Use long; n >= 0.
Official Solution
static long fib(int n){long a=0,b=1;for(int i=0;i<n;i++){long t=a+b;a=b;b=t;}return a;}
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