**Syntax error:**
missing operator or ';'

Maple's parser came to the point in your input where it has now put the cursor and discovered an error: two things occur next to each other that are not allowed to do so. They must be separated by an operator (e.g.
**+**
,
**-**
,
*****
,
**/**
or
**^**
) or separated into different statements by
**;**
or
**:**
.

The most common cause of this error is omitting the
*****
for multiplication. Another is omitting the parentheses after a function such as
**sin**
. These are the two most important ways in which Maple input differs from normal mathematical notation: multiplication requires a sign, and all functions require parentheses around their arguments.

You can check your input line for syntax errors without attempting to execute it by clicking the check-mark button on the context bar.

**Examples:**

`> `
**3 a + b;**

Syntax error, missing operator or `;`

`> `
**3*a + b;**

`> `
**sin x;**

Syntax error, missing operator or `;`

`> `
**sin(x);**

**See also:**
__context bar__
,
__arithmetic operators__
,
__functions__

**Maple Advisor Database**
R. Israel, 1997