SetInterval() with “if” condition that give the value to a array

Question

I have an setInterval in which there is a condition that defines the array ta . The array is defined for the first time the condition is met, but when the condition is not met, I want to keep the same amount of the first array as given, but for the second time, when the condition is not met, the ta array is not defined. How can I solve this problem?

 var a=1; setInterval(() => { if (a==1){ var ta=[]; for(let i=1;i<3;i++){ ta.push(i); }; console.log(ta); console.log("ta"); a=2; } console.log(ta); // why this is undefined in Second round onwards? },5000);

Answer 1

Put your array ta outside of the setInterval() , otherwise it won't be accessible

 let a = 1 const ta = [] setInterval(() => { if (a === 1) { for (let i = 1; i < 3; i++) ta.push(i) console.log(`ta while equal to 1: ${ta}`) a = 2 } console.log(`ta for every 5s interval: ${ta}`) }, 5000);