introduction.md

Numbers

There are two different types of numbers in F#:

• Integers: numbers with no digits behind the decimal separator (whole numbers). Examples are -6, 0, 1, 25, 976 and 500000.
• Floating-point numbers: numbers with zero or more digits behind the decimal separator. Examples are -2.4, 0.1, 3.14, 16.984025 and 1024.0.

The two most common numeric types in F# are int and float. An int is a 32-bit integer and a float is a 64-bit floating-point number.

Arithmetic is done using the standard arithmetic operators. Numbers can be compared using the standard numeric comparison operators and the equality (=) and inequality (<>) operators.

Converting between number types is done through built-in conversion operators. These conversion operators are named after the type they will be converting to. F# does not support automatic conversion between number types.

Conditionals

In this exercise you must conditionally execute logic. The most common way to do this in F# is by using an if/elif/else statement:

if x = 5 then
    // Expression to evaluate when x equals 5
elif x > 7 then
    // Expression to evaluate when x greater than 7
else
    // Expression to evaluate in all other cases

The condition(s) used in an if/elif/else expression must be of type bool. F# has no concept of truthy values.