C++ LANGUAGE FLOATING-POINT LITERALS 24

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C++ LANGUAGE FLOATING-POINT LITERALS

Floating-point Literals 


A floating-point literal has an integer part, a decimal point, 
a fractional part, and an exponent part. You can represent 
floating point literals either in decimal form or exponential form. 
While representing using decimal form, you must include the decimal 
point, the exponent, or both and while representing using exponential 
form, you must include the integer part, the fractional part, or both. 
The signed exponent is introduced by e or E. 

Here are some examples of floating-point literals: 

3.14159       // Legal 
314159E-5L    // Legal 
510E          // Illegal: incomplete exponent 
210f          // Illegal: no decimal or exponent 
.e55          // Illegal: missing integer or fraction