Variable Substitution

Syntax: $varName

• varName is a sequence of letters, digits, underscores.
• May occur anywhere in a word; use ${varName} to delimit if necessary.

Examples:

set b 66

66

set a b

b

set a $b

66

set a $b.3

66.3

set a $b3

error: no such variable.

set a ${b}3

663