float means "floating", which is a floating-point data type in Java. It is used to store single-precision floating-point numbers. The default value is "0.0f". The memory is allocated 4 bytes, occupying 32 bits. , 6-7 valid decimal places. float can save memory space when storing large floating point arrays; floating point numbers cannot be used to represent precise values, such as currencies.
What does float mean in java?
The meaning of float in java: float is a single-precision floating point number, with 4 bytes of memory allocated, occupying 32 bits, and 6-7 effective decimal places.
float data type is a single-precision, 32-bit floating point number that complies with the IEEE 754 standard;
float can save memory space when storing large floating point arrays;
The default value is 0.0f;
Floating point numbers cannot be used to represent precise values, such as currency;
Example:
float f1 = 234.5f。
Note: Computer systems adopt so-called floating point numbers way of expression. This expression uses scientific notation to express real numbers, that is, it uses a mantissa (also called a significant figure), a base (Base), an exponent (Exponent), and a symbol to express positive and negative numbers. Floating point numbers use exponents to achieve the effect of floating decimal points, which can flexibly express a wider range of real numbers.
float: 1 bit (sign bit), 8 bits (exponent bit), 23 bits (mantissa bit)
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