JavaScript(JS) 透過 substr函數 進行 字串切割/分割/分段 (子字串)運算

線上執行(線上編譯): https://www.programiz.com/javascript/online-compiler/

code:

// Online Javascript Editor for free
// Write, Edit and Run your Javascript code using JS Online Compiler
Trans_Date= "230504";
Trans_Time= "101907";
console.log("20"+Trans_Date.substr(0, 2)+"/"+Trans_Date.substr(2, 2)+"/"+Trans_Date.substr(4, 2)+" " +Trans_Time.substr(0, 2)+":"+Trans_Time.substr(2, 2));
console.log("Welcome to Programiz!");

/*
node /tmp/r5Iostsc6w.js
2023/05/04 10:19
Welcome to Programiz!
*/