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Programming In C

Programming In C: INTRODUCTION: C Is A Programming Language Developed At AT and T’s Bell Laboratories Of USA In 1972.

C Programming Language Was Designed And Written By A Man Named Dennis Ritchie.C Programming Language Is A Reliable, Simple And Easy To Use Language.

The C Character Set: 

A Character Denotes Any Alphabet, Digit Or Special Symbol Used To Represent Information.

Alphabets A, B, ……..,Y, Z

Alphabets a, b, ………,y, z

Digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Special Symbols ∼ ‘ ! # @ % ∧ & $ * ( ) _ – + = } { \ | :  ; < > , . ? /

Types Of C Constant:

C Contants Can Be Divided Into Two Major Catogories-

(i) Primary Constants – Integer Constant, Real Constants, Charecter Constants

(ii) Secondary Constants – Array, Pointer, Structure, Union Etc.

 

(i) Primary Constants

(a) Integer Constant

  • An Integer Constant Must Have Atleast One Digit.
  • It Can Be Either Positive Either Negative.
  • It Must Not Have A Decimal Point.
  • If No Sign Prceds An Integer Constant, It Is Assumed To Be Positive.
  • No Commas Or Blanks Are Allowed Within An Integer Constant
  • The Allowable Range For Integer Constants Is -32768 To 32767

(b) Real Constants

  • Real Constants Are Often Called Floating-Point Constants.
  • The Real Constants Could Be Written In Two Forms, Fractional Form And Exponential Form.
  • A Real Constant Must Have Atleast One Digit.
  • It Must Have A Decimal Point.
  • It Could Be Either Positive Or Negative.
  • No Commas Or Blanks Are Allowed Within A Real Constant.

Example: +321.24 (Positive Real Constant)

426.0 (Positive Real Constant)

-32.76 (Negative Real Constant)

(c) Character Constants

A Character Constant Is A Single Alphabet, A Single Digit Or A Single Special Symbol Enclosed Within SIngle Inverted Commas.

Example: ‘A’ Is A Valid Character Constant Whereas ‘A’ Is Not.

 

 

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