Uploaded byRumman Ansari
Type casting in c programming
Type casting is converting a variable from one data type to another. It is done explicitly using a cast operator like (type_name). It is best to cast to a higher data type to avoid data loss as casting to a lower type may truncate the value. There are two types of casting in C - implicit casting which happens automatically during assignment, and explicit casting which requires a cast operator. Implicit casting is done when assigning a value to a compatible type while explicit casting is needed when types are incompatible.
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Type casting in c programming
- 1. Type casting In CProgramming
- 2. What is Typecasting Type casting is a way to convert a variable from one data type to another data type. For example, if you want to store a long value into a simple integer then you can type cast long to int. You can convert values from one type to another explicitly using the cast operator. It is best practice to convert lower data type to higher data type to avoid data loss. Data will be truncated when higher data type is converted to lower. For example, if float is converted to int, data which is present after decimal point will be lost. (type_name) expressioncast operator:
- 3. Example #include <stdio.h> void main() { float x; x = 7/5; printf("%f n",x); } #include <stdio.h> void main () { float x; x = (float) 7/5; printf("%f n",x); } Output: 1.000000 Press any key to continue . . . Output: 1.400000 Press any key to continue . . . No Typecasting in this Example Typecasting Here is the difference between this result this result is not correct actually .Here typecasting is necessary So after type casting get the correct result
- 4. Types of typecastingin C Programming 1. Implicit conversion Implicit conversions do not required any operator for converted . They are automatically performed when a value is copied to a compatible type in program. 2. Explicit conversion Explicit conversions required cast operator for converted . They are not automatically performed when a value is copied to a compatible type in program.
- 5. Example #include<stdio.h> #include<conio.h> void main() { int i=20; floatp; p=i; // implicit conversion printf("implicit value is %f n",p); } #include<stdio.h> void main() { int i=20; short p; p = (short) i; // Explicit conversion printf("Explicit value is %d n",p); } implicit value is 20.000000 Press any key to continue . . . Explicit value is 20 Press any key to continue . . . 1. Implicit conversion 2. Explicit conversion
- 6. The usual arithmeticconversions are implicitly performed to cast their values in a common type Usual Arithmetic Conversion Short/char int Unsigned int long Unsigned long floatdouble Long double Unsigned long long
- 7.