floating point constant in c

short ppt on floating point constant in c.

1. NAME: RAHUL SAMANTA DEPARTMENT: ELECTRICAL ENGINEERING SEMESTER: 2 nd YEAR: 1 st SUBJECT: COMPUTER SCIENCE (CS-201) TOPIC: FLOATING POINT CONSTANT

2. FLOATING POINT CONSTANT IN C LANGUAGE It is a part of numeric constant. It is also known as real constant.

3. CONSTANTS INTEGER FLOATING POINT CHARACTER STRING

4. DESCRIPTION OF FLOATINT POINT CONSTANT A " floating - point constant " is a decimal number that represents a signed real number. The representation of a signed real number includes an integer portion, a fractional portion, and an exponent. We use  floating - point constants  to represent floating - point  values that cannot be changed.

5. A floating-point constant consists of: Decimal integer Decimal point Decimal fraction e  or  E  and a signed integer exponent (optional) Type suffix:  f  or  F  or  l  or  L  (optional) NOTE Either decimal integer or decimal fraction (but not both) can be omitted. Either decimal point or letter  e  (or  E ) with a signed integer exponent (but not both) can be omitted. These rules allow conventional and scientific (exponent) notations. Negative floating constants are taken as positive constants with an unary operator minus (-) prefixed.

6. TYPES There is total three types float no suffix defines double f F defines long double l L defines

7. SYNTAX floating-point-constant :      fractional-constant   exponent-part   floating-suffix      digit-sequence   exponent-part   floating-suffix fractional-constant :      digit-sequence   .   digit-sequence      digit-sequence   . exponent-part :      e   sign   digit-sequence      E   sign   digit-sequence sign : one of      + - digit-sequence :      digit      digit-sequence   digit floating-suffix : one of      f l F L

8. EXANPLE PROGRAM 1 2 3 4 5 6 7 8 9 10 #include<stdio.h> #include<conio.h> int main () { const float a = 2E - 4 ; clrscr (); printf ( “ Value of a =% e” , a ); getch (); return ; } Output Value of a = 2.000000e-04

9. THANK YOU