Layman's If and then conditions to be coded in amibroker

Algos, strategies, code
1

Preconditions of Range, pH, pL, H & L are already defined in the code

FOR INFO:

Gb = Range + pH;
Wb = Range - pL;

G = Range + H;
W = Range - L;

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Now want to write a code in amibroker for below conditions:

PART1:

if (G AND W) > Wb then this condition should be called as D2
if (G AND W) < Wb then this condition should be called as D3

PART2: 

if D2 condition is true then, B = G
if D3 condition is true then, B = Gb

PART3:

After getting the B value want to find the value of nB 

nB = Range + B

2

the syntax of the if condition in amibroker afl is 

if, else Statement

if( expression )
statement1 
[else 
statement2]

The if keyword executes statement1 if expression is true (nonzero); if else is present and expression is false (zero), it executes statement2. After executing statement1 or statement2, control passes to the next statement.

Example 1

if ( i > 0 )
    y = x / i;
else 
{
    x = i;
    y = abs( x );
}
3

Thats right sir.
But i am not able to put my condition in this if else code.
Can u please spare some time and code for me with the condition that i have mentioned in my question