JS: What's the difference between =+ and +=

 

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  • Difference between += and =+ in javascript 1 answer

    • =+ will cast implicitly x to a number and assign sumX the value

    += will add x to sumX without an attempt at casting

  • sumY += y; adds y to sumY .
  • sumY =+ y; is equivalent to sumY = (+y); . For numbers, the unary plus operator is a no-op, so the entire expression simply assigns y to sumY .
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