Question

What is the inclusive range of float and double in Java?

Why it is not suggested to float, double when precision is critical.ja

Answer 1

Primitive Data Types in Java 

Boolean: 1-bit 

• May take on the values true and false only. 

Byte: 1 signed byte (two's complement).  

• Covers values from -128 to 127. 

short: 2 bytes, signed (two's complement) 

• -32,768 to 32,767 

int: 4 bytes, signed (two's complement). 

•  -2,147,483,648 to 2,147,483,647. 

long: 8 bytes signed (two's complement).  

• Ranges from -9,223,372,036,854,775,808 to +9,223,372,036,854,775,807. 

float: 4 bytes, IEEE 754.  

• Covers a range from 1.40129846432481707e-45 to 3.40282346638528860e+38 (positive or negative). 

double: 8 bytes IEEE 754.  

• Covers a range from 4.94065645841246544e-324d to 1.79769313486231570e+308d (positive or negative). 

char: 2 bytes, unsigned, Unicode  

• Ranges from 0 to 65,535