Basic arithmetic operators:
Addition (+) - Add numbers, concatenate strings, arrays, and hash tables.
6 + 2 # result = 8
"file" + "name" # result = "filename"
@(1, "one") + @(2.0, "two") # result = @(1, "one", 2.0, "two")
@{"one" = 1} + @{"two" = 2} # result = @{"one" = 1; "two" = 2}
Subtraction (-) - Subtract or negate numbers.
6 - 2 # result = 4 - -6 # result = 6 (Get-Date).AddDays(-1) # Yesterday’s date
Multiplication (*) - Multiply numbers or copy strings and arrays the specified number of times.
6 * 2 # result = 12
@("!") * 4 # result = @("!","!","!","!")
"!" * 3 # result = "!!!"
Division (/) - Divide numbers, When the quotient of a division operation is an integer, PowerShell will round the value to the nearest integer. When the value is .5, it will round to the nearest even integer.
6 / 2 # result = 3
Modulus (%) - Return the remainder of an integer division.
3 % 4 # result = 3 (cannot divide by a larger integer so the entire no. is the remainder)
4 % 4 # result = 0 (no remainder
5 % 4 # result = 1 (remainder 1)Modulus operations are particularly useful when you need to keep a number within certain bounds, e.g. hours in a day, days of the week, months in a year. The number returned by Mod will never be larger than the divisor.
In addition to standard PowerShell string methods we can also call .Net Math functions:
.NET Math library: [math]::Round($var, p) Round a variable to p places. [math]::Round($var) Round a variable to 0 places. [math]::Abs(n) Returns the absolute value of n [math]::BigMul [math]::Ceiling(n) Rounds everything up, towards positive infinity. [math]::DivRem [math]::Equals(n,m) Compare two values and return a [boolean] (true/false) result. (unlike -eq the types must also match) [math]::Exp(p) Raise e to a power p [math]::Floor(n) Rounds everything down, towards negative infinity. [math]::GetHashCode [math]::GetType [math]::Log(n) base e logarithm of n [math]::Log10(n) base 10 logarithm of n [math]::Max(n,m) Return the larger of two values [math]::Min(n,m) Return the smaller of two values [math]::Pow(n,p) Raise a number n to a power p [math]::IEEERemainder [math]::Round(n,p) Round a number n to p decimal places. Default=0 decimal places. [math]::Sign [math]::Sqrt(n) Square Root of a number n [math]::ToString [math]::Truncate(n) Remove the decimal returning only an Integer. Rounds toward zero. The trig functions below all accept an angle, measured in radians. To convert degrees to radians, multiply by pi/180 using [Math]::PI [math]::Acos [math]::Asin [math]::Atan [math]::Atan2 [math]::Cos [math]::Cosh [math]::Sin [math]::Tan [math]::Sinh [math]::Tanh Static mathematical constants: [math]::e [math]::pi
You can list all the static members of system.math like this: (via /\/\o\/\/ )
[system.math] | gm -static
Find the Minimum value of two variables:
$var1 = 764.4
$var2 = 1409
$answer = [math]::min($var1,$var2)
$answer
Find the Tangent of 45 degrees:
$answer = [System.Math]::Tan(45/180*[System.Math]::PI)
$answer
“Film is one of the three universal languages, the other two: mathematics and music” ~ Frank Capra
math.class - MSDN scroll down for full definitions.
Concatenation - Several methods to combine strings together.
PowerShell Operators - More advanced Operators for Arrays and formatting expressions.
Prime numbers - Check.