A real or floating-point number has an integral part and a fractional part which are separated by a decimal point.
e.g. 0.01 70.456 3e+5 .5067e-16 3.14159
Floating-point numbers can be either positive or negative and are always signed numbers. Floating point numbers can be positive or negative. There are three floating types
- float
- double
- long double.
Exponential (scientific) notation can be used to represent real numbers such as 123000.0 = 1.23×10^{5} = 1.23e5 = 1.23E5.
e or E is read as “times 10 to the power” e.g. 0.34e-4 = 0.000034 2500 = 25e2
Number | Scientific Notation | Exponential Notation |
1000000000 | 1.0×10^{9} | 1.0e9 |
123000 | 1.23×10^{5} | 1.23e5 |
322.56 | 3.2256×10^{2} | 3.2256e2 |
0.000056 | 5.6×10^{-5} | 5.6e-5 |
A note on floats
A suffix can be appended to a floating constant to specify its type
Suffix | Type | Example |
F f or F | float | 3.7 |
l or L | long double | 3.7L |
Get The Coding Examples From C Language Code Example Page