# Simple calculation with scalar variable : Scalar « Language Basics « Perl

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Simple calculation with scalar variable
 ```    \$x = 2; \$x = \$x + 2; print \$x; \$x = \$x - 2; print \$x; \$x = \$x * 5; print \$x;                 ```
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 A scalar is a variable that holds a single value, a single string, or a number. 10 A scalar variable can reference a string value or a numeric value. 11 Assign new value to the integer scalar variable 12 Compound assignment operator with scalar variable 13 Concatenate two scalar variables with double quotes 14 \$data is a scalar variable, while @data is an array 15 Initializing scalars and printing their values 16 Perl supports integers (decimal, octal, hexadecimal), floating point numbers, scientific notation, Booleans, and null. 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