Searches a character string for a character that is not a lowercase letter and returns the first position at which that character is found
Category: Character
NOTLOWER ( string <, start >)
string
is the character constant, variable, or expression to search.
start
is an optional integer that specifies the position at which the search should start and the direction in which to search.
The results of the NOTLOWER function depend directly on the translation table that is in effect (see 'TRANTAB= System Option' on page 1617) and indirectly on the ENCODING and LOCALE system options.
The NOTLOWER function searches a string for the first occurrence of any character that is not a lowercase letter. If such a character is found, NOTLOWER returns the position in the string of that character. If no such character is found, NOTLOWER returns a value of 0.
If you use only one argument, NOTLOWER begins the search at the beginning of the string. If you use two arguments, the absolute value of the second argument, start , specifies the position at which to begin the search. The direction in which to search is determined in the following way:
If the value of start is positive, the search proceeds to the right.
If the value of start is negative, the search proceeds to the left.
If the value of start is less than the negative length of the string, the search begins at the end of the string.
NOTLOWER returns a value of zero when
the character that you are searching for is not found
the value of start is greater than the length of the string
the value of start =0.
The NOTLOWER function searches a character string for a character that is not a lowercase letter. The ANYLOWER function searches a character string for a lowercase letter.
The following example uses the NOTLOWER function to search a string for any character that is not a lowercase letter.
data _null_; string='Next = _n_ + 12E3;'; j=0; do until(j=0); j=notlower(string,j+1); if j=0 then put +3 "That's all"; else do; c=substr(string,j,1); put +3 j= c=; end; end; run;
The following lines are written to the SAS log:
j=1 c=N j=5 c= j=6 c== j=7 c= j=8 c=_ j=10 c=_ j=11 c= j=12 c=+ j=13 c= j=14 c=1 j=15 c=2 j=16 c=E j=17 c=3 j=18 c=; That's all
Function:
'ANYLOWER Function' on page 307