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public class FibIterative{
static int fib(int n){
int a = 0, b = 1,c;
if(n==0){
return n;
}
for(int i = 2; i<=n;i++){
c = a+b;
a = b;
b = c;
}
return b;
}
public static void main(String[] args){
System.out.println(fib(5));
}
}
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