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STRLEN key

相关命令

• APPEND
• BITCOUNT
• BITOP
• BITPOS
• DECR
• DECRBY
• GET
• GETBIT
• GETRANGE
• GETSET
• INCR
• INCRBY
• INCRBYFLOAT
• MGET
• MSET
• MSETNX
• PSETEX
• SET
• SETBIT
• SETEX
• SETNX
• SETRANGE
• STRLEN

Available since 2.2.0.

时间复杂度： O(1)

Returns the length of the string value stored at key. An error is returned when key holds a non-string value.

返回值

Integer reply: the length of the string at key, or 0 when key does not exist.

例子

redis> SET mykey "Hello world"

OK

redis> STRLEN mykey

(integer) 11

redis> STRLEN nonexisting

(integer) 0

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