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Objective-C: Variables

Objective-C: Variables

A variable it’s a data type and can be composed by letters, numbers and underscore character.

Type:

  • char: 1 byte(octet)
  • int
  • float: single precision floating point value
  • double: double precision floating point value
  • void: absence of type
  • bool: true or false – 1 byte

Variable definition:

Syntax:   type variable_name;

Example:

int i,j,k;

char c, ch;

float f, money;

double d;

Code:

#import <Foundation/Foundation.h>

// Variable declaration:
extern int a, b;
extern int c;
extern float f;

int main ()
{
  /* variable definition: */
  int a, b;
  int c;
  float f;
 
  /* actual initialization */
  a = 10;
  b = 20;
  
  c = a + b;
  NSLog(@"value of c : %d \n", c);

  f = 70.0/3.0;
  NSLog(@"value of f : %f \n", f);
 
  return 0;
}

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