Числа з Плаваючою Комою та Double
Floating point numbers, also called floats, represent decimal numbers. We can declare a variable of type float using the float keyword:
main.cs
1float myVariable = 3.14f;
The letter 'f' in the value 3.14f tells the compiler that the value is of type float. Values of the float datatype should always be represented in this format.
The float data type has a limited precision so it can only store 6 to 9 digits after the decimal. There is another datatype called double which offers a higher precision:
main.cs
12345float myVar1 = 3.1415926535897f; double myVar2 = 3.1415926535897; Console.WriteLine(myVar1); // Output: 3.1415927 Console.WriteLine(myVar2); // Output: 3.1415926535897
As float has a lower precision, the value 3.1415926535897 is automatically rounded off till its 7th decimal digit and the result is stored in the variable myVar1.
Like int and long, we can also perform arithmetic operations on float and double values.
main.cs
12345float var1 = 1.14f; double var2 = 1.00; float var3 = 1.0f; double var4 = var1 + var2 + var3;
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Can you explain the main differences between float and double in C++?
When should I use float instead of double in my programs?
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Floating point numbers, also called floats, represent decimal numbers. We can declare a variable of type float using the float keyword:
main.cs
1float myVariable = 3.14f;
The letter 'f' in the value 3.14f tells the compiler that the value is of type float. Values of the float datatype should always be represented in this format.
The float data type has a limited precision so it can only store 6 to 9 digits after the decimal. There is another datatype called double which offers a higher precision:
main.cs
12345float myVar1 = 3.1415926535897f; double myVar2 = 3.1415926535897; Console.WriteLine(myVar1); // Output: 3.1415927 Console.WriteLine(myVar2); // Output: 3.1415926535897
As float has a lower precision, the value 3.1415926535897 is automatically rounded off till its 7th decimal digit and the result is stored in the variable myVar1.
Like int and long, we can also perform arithmetic operations on float and double values.
main.cs
12345float var1 = 1.14f; double var2 = 1.00; float var3 = 1.0f; double var4 = var1 + var2 + var3;
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