if_statements

Overview:

There are 2 ways of implementing an if-statement in Niv, as shown below:

Important: Multiline ifs and elses are situationally sensitive: each curly bracket has got to be on a line of its own and directly under the if command, elses and else ifs must go in between 2 scopes without any empty lines in between.

// using a multiline if

if (cal 5 * 5) < 0
{
    print "This won\'t run\n"
}
else if 5 = 0 
{
    print "This too\n"
}
else
{
    print "But this will\n"
}

// or using a single line if

singleif 5 > 0 (print "This will run\n") // only single "true" node
singleif 5 < 0 (print "This won\'t\n") (print "But worry not\n")  // both "true" and optional "false" node

---

if

usage example:

// template
if a op b

// specific use
if "hey" ! "bye"

Args:

• a: Any value
• op: STR or CHAR
• b: Any value

Desc:

Runs cal on a, op, and b. If it returns true, the program runs the given scope, and if not, the program will check wether there's an else statement and run it.

Return value: VOID.

For more complex examples check if_statements.nst

---

singleif

usage example:

// template
singleif a op b (...) (...)?

// specific use
singleif "hey" = "bye" (print "doesn\'t work\n") 
singleif "hey" = "bye" (print "doesn\'t work\n") (print "works\n") 

Args:

• a: STR
• op: STR or CHAR
• b: Any value
• (...): Any node
• (...)?: (Optional) Any node

Desc:

Runs cal on a, op, and b. If it returns true, the program traverses the given node. Otherwise, it will traverse the "false" node if present.

Return value: The returned value of the traversed node or VOID if nothing is traversed.

For more complex examples check if_statements.nst while <-- What is this?