Operator precedence: Difference between revisions

There are two types of indirect addressing: Indirect X and Indirect Y. These differ in that the indirect X mode applies the offset before looking up the address.

LDY #$03

LDA ($20,x) ;uses the values stored at $20+x and $21+x as a memory address, and reads the byte at that address.

The use of parentheses for these modes is required, and nicely illustrates the order of operations. To put it in terms of a hierarchy:

See [https://arturo-lang.io/documentation/language/#precedence-and-evaluation Arturo documentation].

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=={{header|AWK}}==

See also: [https://www.gnu.org/software/gawk/manual/html_node/Precedence.html#Precedence gawk-Reference]

# Operators are shown in decreasing order of precedence.

# A blank line separates groups of operators with equal precedence.

# ^= exponentiation assignment

# **= exponentiation assignment (not all awk's)

=={{header|BASIC256}}==

Here, <code>2 + 1</code> is evaluated first:

Here, <code>-˜</code> is evaluated first. <code>˜</code> flips the arguments given to a function.

A precedence table for all BQN syntax is shown below.

=={{header|Lambdatalk}}==

As with Common Lisp and Scheme, Lambdatalk uses s-expressions so there is no need for operator precedence.

Such an expression "1+2*3+4" is written {+ 1 {* 2 3} 4}

=={{header|LIL}}==

=={{header|min}}==

min is a stack language that uses postfix notation, so for the most part, all operators have the same precedence. Sigils are a small exception. However, they de-sugar to postfix. For example, the following two lines are equivalent:

=={{header|Nim}}==

=={{header|Q}}==

Operators have equal precedence and expressions are evaluated from right to left.

9

q)(3*2)+1 / Brackets give the usual order of precedence

q)x:5

q)(x+5; x:20; x-5)

=={{header|Quackery}}==

=={{header|Racket}}==

Racket uses S-expr for its syntax, operators and functions show no precedences as all code is written as:

function being any function or operator (language or user defined) and arguments are the arguments passed to it.

=={{header|Ring}}==

The next table present operators from higher precedence (Evaluated first) to lower precedence.

See 3+5*4 # prints 23

=={{header|Ruby}}==

the Seed7 Structured Syntax Description ([http://seed7.sourceforge.net/manual/syntax.htm S7SSD])

A S7SSD statement like

specifies the syntax of the <code>+</code> operator.

The right arrow <code>-&gt;</code> describes the associativity:

Binding of operands from left to right. With <code>7</code> the priority

of the <code>+</code> operator is defined. The syntax pattern

is introduced and delimited with dots (<code>.</code>). Without dots the pattern is

<pre>() + ()</pre>

For example:

See also the [https://trizen.gitbooks.io/sidef-lang/content/syntax_and_semantics/operator_precedence.html documentation] on the precedence of operators.

Math expressions are usually parenthesized for better readability (by beginners):

a abs - b sqrt "same as (a abs) - (b sqrt); unary > binary"

a bitAnd:1+a abs. "same as a bitAnd:(1+(a abs)); unary > binary > keyword"

"Beginners might be confused by:"

=={{header|Standard ML}}==