C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast

Operators

What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement

Looping

What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop

Functions

What is Function C User Defined Functions C Recursion C Passing Parameters

Scope

Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register

Array

What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings

String

What is String C String Functions

Pointer

What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer

Structure

What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def

Union

What is Union

Files

What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

C Interview Sets All Star Patterns All Number Patterns All Alphabet Patterns All Series Patterns
The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C Type Casting

What Type Casting Is?

Generally, Type Casting is the procedure or a way to convert one thing to another. For example consider your friend bob has a bushy hairstyle, everyone of you teasing bob everyday, thus bob decided to change his hairstyle, in the very next day bob went to barber shop and got a spike hairstyle and attracted everyone. Clearly, bob is type casted from bushy hairstyle to spike hairstyle. Here typecasting in done in barber shop.

Type Casting in C

Type Casting in C

C compilers allowed programmers to convert from one data type to another data type by using type cast method. Type casting is also known as type conversion.

Type Casting Rules

  • Type casting can be used to convert lower datatypes to higher datatypes and viceversa e.g.) int (2 bytes) to float (4 bytes).
  • The type name to which conversion is to be done is placed in a closed parenthesis just before the variable. e.g.) if a float variable 'f' has a value 7.5, it can be converted into an integer type using (int)f.

Type Casting Lower Datatype Conversion

Let us write a C program to typecasting int datatype to float datatype

typecastinglower.c
#include <stdio.h>
int main()
{
int a = 3;
int b = 2;
int c;
printf("The value of c = %f ",(float)a/b);
return 0;
}
  • The value of c = 1.500000

Note:

Variables a, b, c belongs to integer data type, where actual result will be in float. Thus, we are in need to typecast the data type of variable 'c' from an intfloat.

Type Casting Higher Datatype Conversion

Let us write a c program to typecasting float datatype to int datatype

typecastinghigher.c
#include <stdio.h>
int main()
{
float a = 3.56;
printf("The value of a = %d ",(int)a);
return 0;
}
  • The value of a = 3

Note:

Variables a belongs to float datatype, which is typecasted to int datatype in the printf statement. Thus integer output is displayed.

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