What are the rules for data type conversion in the C la…

The rules for data type conversion in the C language are as follows:

1. Automatic type conversion: When a value of one data type is assigned to another data type, if the two types are compatible and the target type can hold the value of the source type, automatic type conversion will take place. For example, assigning an integer to a float variable.
2. Type casting: If you need to convert one data type to another, you can use the type casting operator (cast) to make the conversion. The syntax is: (destination type) expression. For example, converting a floating-point number to an integer.
3. Numeric promotion: When different types of operands are used in an operation, C language will automatically convert one operand to another type based on certain rules for the operation to proceed. This process is called numeric promotion. For example, when an integer and a floating-point number are used in an operation, the integer will be promoted to a floating-point number.
4. Truncation: When a larger data type value is assigned to a smaller data type, truncation occurs. Truncation means that the higher bits of data are lost, leaving only the lower bits. This can result in loss of data accuracy.
5. Type compatibility: In C language, some data types can be implicitly converted. For example, assigning a value of type char to a variable of type int, or assigning a value of type int to a variable of type float.