Manual strlen in C

Walks to the terminating zero byte, which is all a C string is.

size_t my_strlen(const char *s) {
    const char *p = s;
    while (*p)
        p++;
    return (size_t)(p - s);
}

Keywords and builtins used here

• char
• const
• my_strlen
• return
• size_t
• while

The run, in numbers

Lines

6

Characters to type

94

Tokens

36

Three-star pace

90 tpm

At the three-star pace of 90 tokens a minute, this run takes about 24 seconds.

Type this snippet

Step 4 of 5 in Arrays & strings, step 25 of 35 in Language basics.

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