What is an explicit implicit conversion type

Explicit type conversion refers to manually converting one data type to another data type by calling built-in functions or using specific syntax, while implicit type conversion refers to JavaScript in certain operations or comparison operations. The engine automatically performs type conversions to meet the needs of the operation.

# Operating system for this tutorial: Window10 system, Dell G3 computer.

In JavaScript, there are explicit type conversions and implicit type conversions.

1. Explicit type conversion:
   Explicit type conversion refers to manually converting one data type to another data type by calling built-in functions or using specific syntax. In JavaScript, common explicit type conversions include:

   • Use parseInt() or parseFloat() to convert a string to a number.
   • Use the String() constructor or call the object's toString() method to convert other data types to strings.
   • Use the Boolean() constructor to convert other data types to Boolean values.

   For example:

   var num = 10;
   var strNum = String(num); // 显式将数字转换为字符串

2. Implicit type conversion:
   Implicit type conversion refers to the During operation, the JavaScript engine will automatically perform type conversion to meet the needs of the operation. This type conversion is performed implicitly by the JavaScript engine, and developers may not perform explicit conversions directly through code.

   For example, when using the addition operator:

   var num = 10;
   var str = "The number is: " + num; // 这里会触发隐式类型转换，将数字转换为字符串然后拼接

Another example is the comparison operator:

   if (10 == "10") {
     // 这里会触发隐式类型转换，将字符串转换为数字进行比较
   }

Implicit type conversion will bring convenience to the code in some cases, but sometimes it may lead to unexpected behavior. Therefore, when writing JavaScript code, you should pay attention to the possible impact of implicit type conversion and try to avoid confusion or confusion. Wrong use.

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