How to do type conversion in c language

There are two types of type conversions in the C language: Implicit conversion (type promotion): occurs automatically when a smaller data type needs to be converted to a larger data type. Explicit conversion (casting): Used to convert a larger data type to a smaller data type by prefixing the variable or expression with the name of the type to be converted to.

Type conversion in C language

Type conversion refers to converting the value of one data type into another A value of a data type. There are two types of conversions in C: implicit conversions and explicit conversions.

Implicit conversion (type promotion)

• When a smaller data type needs to be converted to a larger data type, implicit conversion will Happens automatically.
• For example, convert a char type variable to an int type variable, or convert a float type variable to a double type variable.
• In arithmetic expressions, all smaller operands are automatically converted to the type of the larger operand.

Explicit conversion (casting)

• If you need to convert a larger data type to a smaller data type, you must Use explicit conversion, i.e. cast.
• Coercive type conversion is achieved by prefixing the variable or expression with the name of the type to be converted to.
• Syntax: (type name) Expression
• For example, convert an int type variable to a char type variable: (char) i

Things to consider when converting

• Implicit conversions may result in a loss of precision because values ​​of smaller data types may not be accurate Represented in larger data types.
• Explicit conversions may cause data truncation because values ​​of larger data types may not be represented by smaller data types.
• Explicit conversions should be used with caution, and explicit type checking should be performed when necessary to avoid data errors.

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