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(m4.info) Text handling
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Calculating length of strings
=============================
The length of a string can be calculated by `len':
len(STRING)
which expands to the length of STRING, as a decimal number.
len()
=>0
len(`abcdef')
=>6
The builtin macro `len' is recognized only when given arguments.
Info Catalog
(m4.info) Text handling
(m4.info) Text handling
(m4.info) Index