Java While vs Do-While Loops: Key Difference Every Developer Should Know

Java's while and do-while loops both repeat a block of code based on a condition, but differ in when that condition is evaluated. A while loop checks its condition before executing, meaning the code block may never run if the condition is false from the start. A do-while loop runs the code block first and checks the condition afterward, guaranteeing at least one execution regardless of the condition's initial value. For example, with a ticketCount set to zero, a while loop prints nothing, while a do-while loop prints the message once before stopping. Developers should choose while loops for pre-condition checks and do-while loops when the code must execute at least once.