_javascript techniques of recursive programming in JavaScript language

Title: From 1 Add up to 100 and how much?

Non-recursive loop writing:

Copy Code code as follows:

1run:function () {
2 var sum = 0;
3 for (Var i=1;i<=100;i++) {
4 sum = sum + i;
5}
6 console.log (sum);
7}

The recursive formulation:

Copy Code code as follows:

var testCase = {
sum:0,
Run:function (n) {
if (n>=100) {
return 100;
}
else {
sum = n+ Testcase.run (n+1);
return sum;
}
}
};
Console.log (Testcase.run (1));

The above code on the Internet a lot of search, the following is the equivalent of the wording:

Copy Code code as follows:

Console.log (function (n) {
var sum=0;
if (n<=1) {
return 1;
}
else{
sum = Arguments.callee (n-1) +n;
return sum;
}
}) (100));

This kind of writing is easy to learn. The above is linear recursion, as a recursive introduction of the line, the algorithm's performance efficiency is rotten, not to consider.