How to | Do Basic Calculations
Mathematica serves as a convenient and extensible environment for doing basic math. In addition to performing advanced calculations, Mathematica can also be used as a powerful calculator with arbitrary precision.
Add two numbers:
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Subtract a number from another number:
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Multiply two numbers by using 
or a space:
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Spaces between numbers, variables, or function values are interpreted as multiplication. Mathematica automatically shows a space between numbers with a multiplication symbol:
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Multiply two complex numbers:
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Divide two numbers:
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Mathematica follows the ordinary order of operations in algebraic calculations:
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Compute the fifth power of 3:
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Compute the square root of 25:
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Mathematica displays the results of calculations using integers, rational numbers, or variables in exact form:
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Use N to get numerical results:
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Adding a decimal to any number forces a numerical result:
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This shows 40 significant digits:
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Approximate 
using N:
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Get 50 decimal places:
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Calculate 50 significant digits of 
:
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A large collection of common and well-known functions is built into Mathematica.
Evaluate trigonometric functions:
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Evaluate the natural logarithm of numbers:
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Find the 125
prime number:
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Find the sum of the first billion positive integers:
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Set a value to a variable by using 
:
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Display the value of 
:
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Use 
in a calculation:
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Define a function 
:
Evaluate the function:
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