Java Data Types:
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The datatypes are divided into two types:
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Primitive datatype
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Non – primitive datatype
Primitive datatype defines the size and value of the variable.
There are eight types of primitive datatypes that Java offers us
They are:
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Int – 4 bytes
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Float – 4 bytes
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Char – 2 bytes
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Byte – 1 byte
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Short – 2 bytes
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Long – 8 bytes
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Boolean – 1 bit
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Double – 8 bytes
Let us discuss about all the datatypes one by one:
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Byte: It stores whole numbers from -128 to 127. It replaces int or any other integer types to save memory in the range of -128 to 127.
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Int: It includes the whole numbers from -2147483648 to 2147483647.
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Long: It stores whole number from -9223372036854775808 to 9223372036854775807. It includes numbers when int cannot include the numbers. It is denoted by “L”.
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Float: It stores numbers in form of fractional number which lie between 3.4e-038 to 3.4e+038. Make sure that you are ending the value with “f” at end.
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Double: It stores numbers in form of fractional number which lie between 1.7e-308 to 1.7e+308. Make sure that you are ending the value with “d” at end.
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Boolean: Evaluates a condition is true or false.
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Char or character: It is used to store a single character in single quotation marks. Char myName = ‘G’
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Println(myName)
Alternatively, we can also predict the ASCII values.
How to find square root of a number?
public class Main
{
public static void main(String args[]){
int x = 16;
Sytstem.out.println(Math.sqrt(x));
}
}