How to find an arithmetic sequence in JavaScript

How to find an arithmetic sequence in JavaScript: 1. Create a js sample file; 2. Define a print1 function through "function print1(start, value, endKey) {...}"; 3. Through " for (let i = 0; i

The operating environment of this tutorial: Windows 10 system, javascript version 1.8.5, Dell G3 computer.

How to find an arithmetic sequence in JavaScript?

js implements arithmetic sequence

Arithmetic sequence

/**
 * 等差数列
 * start: 开始数字
 * value: 差值
 * endKey: 结束位置的key
 */
function print1(start, value, endKey) {
    let arr = [];
    for (let i = 0; i < endKey; i++) {
        arr.push(start + (i * value));
    }
    console.log(arr);
}
print1(1, 2, 10);

Related expansion:

Arithmetic sequence A sequence refers to a sequence in which starting from the second item, the difference between each item and its previous item is equal to the same constant, often represented by A and P. This constant is called the tolerance of the arithmetic sequence, and the tolerance is often represented by the letter d.

For example: 1,3,5,7,9...2n-1. The general formula is: an=a1 (n-1)*d. The first term a1=1, the tolerance d=2. The sum formula of the first n terms is: Sn=a1*n [n*(n-1)*d]/2 or Sn=[n*(a1 an)]/2. Note: The above n are all positive integers.

Recommended study: "JavaScript Video Tutorial"

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