Functions in Igor Pro

A function declares what it returns before its name, and closes with End.

Function Area(Variable radius)
    return pi * radius^2
End

Function/S Describe(Variable radius)
    return "circle of area " + num2str(Area(radius))
End

Function/WAVE Ramp(Variable n)
    Make/O/N=(n)/D/FREE out = p
    return out
End

How it works

1. Function with no type suffix returns a number.
2. Function/S returns a string and Function/WAVE returns a wave reference.
3. Parameters are declared with their types, in the parentheses or below.

Keywords and builtins used here

• Area
• End
• Function
• Make
• Variable
• num2str
• pi
• return

The run, in numbers

Lines

12

Characters to type

221

Tokens

53

Three-star pace

70 tpm

At the three-star pace of 70 tokens a minute, this run takes about 45 seconds.

Type this snippet

Step 2 of 3 in Variables & functions, step 6 of 18 in Language basics.

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Functions in other languages

• C
• Rust