medium
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Step Explanation
Understand what is happening first
Execution Visualizer
Watch memory, stack, queues, and output
Execution Visualizer
live
JavaScript starts executing the script from top to bottom. console.log('Start') is a synchronous operation — it runs immediately on the call stack.
Call Stack
2 frames
TOP ↑
▲console.log('Start')
frame 1main()
frame 0↓ BOTTOM
Global Context
Memory
0 variablesNo variables in memory
Console Output
01Start
varfnobjarrclosure
Code Preview
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Code
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