The following are TML 2.5 Standard Procedures and Functions that
you may find in the sourcecode:

inc(x).. increments the value of x or x := x +1.
dec(x).. decrements.... etc.

trunc(x).. converts a real-type value to longint value rounded down.
round(x).. converts real to longint rounded to nearest whole number.

odd(x)..  tests whether integer is odd... true if odd.
abs(x).. returns absolute value of number.
sin(x).. sine of number (radians)
cos(x).. cosine of number.

concat(str1,str2).. merges strings.
length(str).. gives number of characters in string.

leave... exit the current loop immediately (For loops, Repeat... etc.)