18_while_loops.js

// Loops
// repeat run a block of code whilte condition is true
// while loop
// turn on autosave if vcode hangup

// if u declare use const will error cz const can;t change
// const calculate = 10;

// while (calculate == 10) {
//   console.log('calculate from : ' + calculate);
//   calculate++;
// }

let start = 20;

// while (start >= 10) {
//   console.log('print start' + start);
//   start++; //false and not execute
// }

// while (start >= 10) {
//   console.log('print start' + start);
//   start++; //will print looping cz always bigger
// }

// while (start >= 10) {
//   console.log('print start ' + start);
//   start--; //will print 20 ... 10 why 10, cz >=
// }

// while (start > 10) {
//   console.log('print start ' + start);
//   start--; //will print 20 ... 11 why 10, cz 10 > 10 is false
// }

while (start < 40) {
  console.log(start);
  start++; //will print 20 .. 39
}