Linux in a Nutshell, Fifth Edition

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gawk

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return

return [expr]

Used within a user-defined function to exit the function, returning

the value of expr. The return value of a function is undefined if expr

is not provided.

rshift

rshift(expr, count) {G}

Return the result of shifting expr right by count bits. Both expr and

count should be values that fit in a C unsigned long.

sin

sin(x)

Return the sine of x, an angle in radians.

split

split(string, array [, sep])

Split string into elements of array array[1],…,array[n]. Return the

number of array elements created. The string is split at each occur-

rence of separator sep. If sep is not specified, FS is used.

sprintf

sprintf(format [, expressions])

Return the formatted value of one or more expressions, using the

specified format. Data is formatted but not printed. See “printf

Formats,” later in this chapter, for a description of allowed format

specifiers.

sqrt

sqrt(arg)

Return the square root of arg.

srand

srand([expr])

Use optional expr to set a new seed for the random number gener-

ator. Default is the time of day. Return value is the old seed.

strftime

strftime([format [,timestamp]]) {G}

Format timestamp according to format. Return the formatted

string. The timestamp is a time-of-day value in seconds since

midnight, January 1, 1970, UTC. The format string is similar to

that of