A conditional statement allows to evaluate one or more conditional instructions. Depending on the result, a block of code can be either executed or skipped. Conditional statements can be found in nearly all programming languages. It is an important part of the control flow.
A conditional statement starts with an IF keyword and ends with an END keyword.
if
<condition>
then
<consequent>
else
<alternative>
end
<condition>
- a conditional instruction. This instruction turns the condition result into either true
or false.
<consequent>
- a branch of the code that executes if the condition result is true
.
<alternative>
- an optional branch of the code that executes if the condition result is false
. If else
is omitted the flow skips the consequent
branch and continues after a closing end
keyword.
if
is_player_playing 0
then
0ace: "player is ready"
else
0ace: "player is not ready"
end
Depending on the result of the is_player_playing
instruction, one or another message will be displayed.
if and
allows to combine up to 8
conditional instructions and execute a block of code if all of them are true
.
if and
<condition 1>
<condition 2>
...
<condition 8>
then
<consequent>
else
<alternative>
end
<consequent>
- a branch of the code that executes if all conditions are true
.
<alternative>
- an optional branch of the code that executes if any condition is false
. If else
is omitted the flow skips the consequent
branch and continues after a closing end
keyword.
{% hint style="warning" %} Short-circuit evaluation is not supported. All conditions are evaluated regardless of the result of the preceding checks. {% endhint %}
Checking if a number is within the given range:
int x
if and
x >= 0
x <= 10
then
0ace: "x is between 0 an 10"
end
if or
allows to combine up to 8
conditional instructions and execute a block of code if at least one of them is true
.
if or
<condition 1>
<condition 2>
...
<condition 8>
then
<consequent>
else
<alternative>
end
<consequent>
- a branch of the code that executes if any condition is true
.
<alternative>
- an optional branch of the code that executes if all conditions are false
. If else
is omitted the flow skips the consequent
branch and continues after a closing end
keyword.
{% hint style="warning" %} Short-circuit evaluation is not supported. All conditions are evaluated regardless of the result of the preceding checks. {% endhint %}
Checking if the vehicle model matches one of the given choices:
if or
model == #PCG600
model == #FREEWAY
then
0ace: "model is either PCG600 or Freeway"
else
0ace: "model is neither PCG600 nor Freeway"
end