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Chapter 6. Expressions and Operators

6.3.4 Function Operators

The following two types of functions are available in BHT-BASIC, both of which work as

function operators:





Built

BuiltBuilt

Built-

-in Functions

in Functionsin Functions

in Functions

Already built in BHT-BASIC, e.g., ABS and INT.





User

UserUser

User-

-defined Functions

defined Functionsdefined Functions

defined Functions

Defined by using DEF FN (in single-line form), DEF FN...END DEF (in block form),

SUB...END SUB, or FUNCTION...END FUNCTION statement.

6.3.5 String Operators

A character string operator may concatenate or compare character strings.

Listed below are the types of character string operators available.

Operations Character String Operators Examples

Concatenation

Comparison

+ (Plus sign)

= (Equal)

<>, >< (Not equal)

>, <, =<, =>, <=, >= (Greater or less)

a$+"."+b$

a$=b$

a$<>b$, a$><b$

a$>b$, a$=>b$





Concatenation of Character Strings

Concatenation of Character StringsConcatenation of Character Strings

Concatenation of Character Strings

The process of combining character strings is called concatenation and is executed with

the plus sign (+). The example below concatenates the character strings, a$ and b$.

a$="Work1":b$="dat"

PRINT a$+"."+b$

Work1.dat

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 586 587

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