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GeezerVison is showing javascript.info — if (a string with zero)

  • Tutorial
  • The JavaScript language
  • JavaScript Fundamentals
  • Conditional branching: if, '?'
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if (a string with zero)

importance: 5

Will alert be shown?

if ("0") {
  alert( 'Hello' );
}

Yes, it will.

Any string except an empty one (and "0" is not empty) becomes true in the logical context.

We can run and check:

if ("0") {
  alert( 'Hello' );
}
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