# What are odd and even functions?

There are two main types of functions:

: if the input of these functions is negative, the result will be negative; if the input is positive (with the same absolute value of the negative input) the output will be positive:**odd functions**

Examples of odd functions are *sin(x)*, *x³, -x, x* etc… .

: regardless of the sign of the input, the result will always be positive:**even functions**

Examples are *x²*, |*x*|*, *1-*x²*, *cos(x)* etc… .

And this is what you need to know about odd and even functions! If you have any questions, leave a comment and I will be happy to reply!

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