# Perl supports integers (decimal, octal, hexadecimal), floating point numbers, scientific notation, Booleans, and null. : Scalar « Language Basics « Perl

Perl supports integers (decimal, octal, hexadecimal), floating point numbers, scientific notation, Booleans, and null.

```

\$year = 2006;                # integer
\$mode = 0775;                # octal number in base 8
\$product_price = 29.95;      # floating point number in base 10
\$favorite_color = 0x33CC99;  # integer in base 16 (hexadecimal)
\$distance_to_moon=3.844e+5;  # floating point in scientific notation
\$bits = 0b10110110;          # binary number

```

### Related examples in the same category

 1 Constant scalar 2 Convert to scalar 3 Creating a Scalar 4 Declare scalar variable to store the integer value 5 Naming Scalar Variables 6 Program to illustrate the use of scalar variables. 7 scalar value interpolation 8 Scalars (Denoted by \$) 9 Simple calculation with scalar variable 10 A scalar is a variable that holds a single value, a single string, or a number. 11 A scalar variable can reference a string value or a numeric value. 12 Assign new value to the integer scalar variable 13 Compound assignment operator with scalar variable 14 Concatenate two scalar variables with double quotes 15 \$data is a scalar variable, while @data is an array 16 Initializing scalars and printing their values 17 Merge scalar variable into the string for output 18 If there are no quotes, then Perl has to decide whether the value is a string or a numeric value. 19 Scalar variables hold a single number or string and are preceded by a dollar sign (\$). 20 Curly Braces