Category:Comparison Operations

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Below is the list of comparison operators:

Operator Meaning
= equal (assignment), may also be used for comparisons in some situations
== equal (comparison)
<> not equal
< less than
<= less than or equal to
> more than
>= more than or equal to

Example 1

Consider the following example of how comparison operations may be used in a program:

00010 ! prompt user and read first number
00020 print "Enter first integer: "
00030 input number1
00040 ! prompt user and read second number
00050 print "Enter second integer: "
00060 input number2
00070 if number1 == number2 then print "number1 is equal to number2"
00080 if number1 <> number2 then print "number1 is not equal to number2"
00090 if number1 <  number2 then print "number1 is less than number2"
00100 if number1 >  number2 then print "number1 is more than number2"
00110 if number1 <= number2 then print "number1 is less than or equal to number2"
00120 if number1 >= number2 then print "number1 is more than or equal to number2"


Example 2 - Ilusetrate the difference between == and =

To illustrate the difference between == and =, look at the following program. You will see the values passed to the function from (A==B) and (A=B) are 0 and 7. (A==B) is a *comparison* and will return 1 or 0 for True or False, while (A=B) is a *assignment* and assigns A the value of B.

Sample Program:

A=5
B=7
fn_test(A,B,(A==B))
fn_test(A,B,(A=B))
en
def fn_test(a,b,c)
  pr 'a=';a;'b=';b;'c=';c
fn

Sample Results:

a= 5 b= 7 c= 0
a= 7 b= 7 c= 7

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