how to convert array of string to number code example

Example 1: convert an array of strings to numbers

let result = ["1", "2", "3", "4"].map(i=>Number(i));
console.log(result);

Example 2: convert array string to number

// CONVERT ARRAY STRING TO ARRAY NUMBER
const arrStr = ["1", "3", "5", "9"];
const nuevo = arrStr.map((i) => Number(i));
console.log(nuevo);
// [1,3,5,9];

Example 3: how to convert array to int

int i, k = 0;
for (i = 0; i < n; i++)
    k = 10 * k + a[i];