What does the following program do? (What is its purpose / functionality?) Be specific.

public int countU( String str )

{

int maxLength = str.length();

int countU = 0;

int asciiCode;

for(int i = 0; i < maxLength; i++) {

asciiCode = (int)str.charAt(i);

if( asciiCode >= 65 && asciiCode <= 90 ) {

countU++;

}

}

return countU;

}