What is the precision of float in C?
float is a 32 bit IEEE 754 single precision Floating Point Number1 bit for the sign, (8 bits for the exponent, and 23* for the value), i.e. float has 7 decimal digits of precision.
What is the limit of float in C?
Floating-Point Types
| Type | Storage size | Value range |
|---|---|---|
| float | 4 byte | 1.2E-38 to 3.4E+38 |
| double | 8 byte | 2.3E-308 to 1.7E+308 |
| long double | 10 byte | 3.4E-4932 to 1.1E+4932 |
Is %f for float in C?
7 Answers. 3.00 is interpreted as a double , as opposed to 3.00f which is seen by the compiler as a float . The f suffix simply tells the compiler which is a float and which is a double .
What is the difference between %F and LF?
For scanf , you should use %f for float and %lf for double . More detail for the language lawyers among us below: There is no difference between %f and %lf in the printf family.
What is the limit of float?
Range of Floating-Point Types
| Type | Minimum value | Maximum value |
|---|---|---|
| float | 1.175494351 E – 38 | 3.402823466 E + 38 |
| double | 2.2250738585072014 E – 308 | 1.7976931348623158 E + 308 |
How to printf a float value in C?
If I just use printf (“%f”, myFloat) I’m getting a truncated value. I don’t know if this always happens in C, or it’s just because I’m using C for microcontrollers (CCS to be exact), but at the reference it tells that %f get just that: a truncated float. If my float is 44.556677, I’m printing out “44.55”, only the first two decimal digits.
How to print a truncated float in C?
I want to print a float value which has 2 integer digits and 6 decimal digits after the comma. If I just use printf (“%f”, myFloat) I’m getting a truncated value. I don’t know if this always happens in C, or it’s just because I’m using C for microcontrollers (CCS to be exact), but at the reference it tells that %f get just that: a truncated float.
How to print float as hex bytes format?
Using a union still is not endian correct as endian of of a float and an int may differ – though that is uncommon. Additional issues exist for rare platforms that have more than 8 bits to a char. The easy alternative is to use “%a” @user2357112 which will print the mantissa/significand in hexadecimal and the exponent in decimal powers-of-2.
Is there union between float and unsigned pointers?
To do that while avoiding violating the strict aliasing rule (type punning pointers), you can use a union between float and unsigned (or better uint32_t for exact width type), e.g.
