== Usage == === index [ STRING, SUBSTRING ] === The index [[function]] is used to locate the first occurrence of a [[substring]] within a [[string]]. If the [[substring]] cannot be found, then a value of [[zero]] is returned: BEGIN { print index("Staffordshire","ford") # 5 } === Case sensitivity === Note that [[awk]] is [[case sensitivity|case sensitive]], so a [[match]] will only occur if the lettercase of the [[string]] matches that of the [[substring]].
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