Typedef

/* Its a variable for the datatype
Example: We define “number” as a synonym for int.
*/

typedef int number
number x = 7;

number square( number y ) {
	return y * y ;
}

/* Now if we decide that we want a float we only have to change it in one place */

Typedef

- Type Names The command typedef can be used to give a short name to a data
type. 
- For example, the name long long is long, so we can define a short name
ll
typedef long long ll;

What is typedef

It is used to choose an alternative name of existing datatype mostly 
used with user-defined data types

Man typedef

typedef enum 
{
	false,
    true
}Bool;

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