DEF

DEF name[(par1 [, … , parN])] = expression

Defines a single line function with the function name name and the parameters par1 to parN. expression is a valid SmallBASIC expression returning a value.

See FUNC for multiline functions and SUB for multiline subroutines.

Example 1: Function with one parameter

def f(x) = 2*x+3
print f(3)

Example 2: Function with two parameters

def f(x,y) = 2*x + 3*sin(y)
print f(1,2)

Example 3: Random number between low and high

' A function for random integer numbers between low and high (inclusive)
DEF randi(lo, hi) = (RND * (hi - lo + 1))\1 + lo

' A function for random float numbers between low and high (inclusive)
DEF randf(lo, hi) = (RND * (hi - lo + 1)) + lo

print randi(0, 100)
print randf(0, 100)

Example 4: DEF and LOCAL

' DEF and LOCAL.bas  SmallBASIC 0.12.2 [B+=MGA] 2016-04-06
'can I use DEF locally in a sub without interfering with main variable or DEF names
def aboutMe() = "I am texting from main code."
? "Hi, ";aboutMe
mySub
? "Goodbye, ";aboutMe
pause
sub mySub()
  'local def aboutMe() = "I am texting from mySub." '<=== note: this did not work 
  local aboutMe
  def aboutMe() = "I am texting from mySub."
? "Hi, ";aboutMe
end

AND AS BAND BG BOR BYREF CALL CASE CATCH CONST DECLARE DEF DO ELIF ELSE ELSEIF END END TRY ENDIF EQV EXIT FALSE FI FOR FUNC GOSUB GOTO IF IFF IMP IN LABEL LET LIKE LOCAL LSHIFT MDL MOD NAND NEXT NOR NOT ON OR REM REPEAT RETURN RSHIFT SELECT STEP STOP SUB THEN THROW TO TRUE TRY UNTIL USE USG USING WEND WHILE XNOR XOR

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