Comparative and logical operators and functions

We assume that the logical false is represented by zero and the logical true is represented by the value different from zero. Note: If a function takes more than one argument, the arguments are separated with semicolon ';'.

x < y

This operator returns one if x is lower than y else it returns zero. For example:
4 < 10 = 1
6 < 2 = 0

x > y

This operator returns one if x is greater than y else it returns zero. For example:
5 > 2 = 1
5 > 8 = 0

x <= y

This operator returns one if x is lower than or equal to y else it returns zero. For example:
4 <= 4 = 1
7 <= 2 = 0

x >= y

This operator returns one if x is greater than or equal to y else it returns zero. For example:
5 >= 5 = 1
3 >= 4 = 0

x == y

This operator returns one if x is equal y else it returns zero. For example:
4 == 4 = 1
6 == 2 = 0

x != y

This operator returns one if x is different from y else it returns zero. For example:
5 != 2 = 1
5 != 5 = 0

x && y (logical and)

This operator returns one if both x and y are different from zero else it returns zero. For example:
4 && 10 = 1
6 && 0 = 0
0 && 0 = 0

x || y (logical or)

This operator returns one either if x or y are different from zero else it returns zero. For example:
5 || 2 = 1
0 || 3 = 1
0 || 0 = 0

if(condition; if_true; if_false)

If the 'condition' is true (different from zero) the function returns 'if_true' else it returns 'if_false', e.g.
if( 0 ; 20 ; 30) = 30
if( 1 ; 20 ; 30) = 20
if( 4<5 ; 10 ; 50) = 10
if( 6>10 ; 200 ; 100) = 100

and(x ; y)

This function does the same thing as the logical operator 'and' (&&)

or(x ; y)

This function does the same thing as the logical operator 'or' (||)

not(x)

If the x is true (different from zero) this function returns zero, otherwise it returns one, e.g.
not(15)=0
not(0)=1