EGR 1400 HANNA EXAM 1 QUESTIONS & SOLUTIONS

EGR 1400 HANNA EXAM 1
QUESTIONS & SOLUTIONS
random number generator - ANSWERRandom myGen=
new Random();

Random number generator from 50-100 - ANSWERmyGen.Next(50,101);

converting text box text (X) to a string - ANSWERtxtbox.text= X.ToString();

Sum of variables (x, x1, x2, x3) - ANSWERdouble sum= x+x1+x2+x3;

mean of 4 variables - ANSWERdouble= (sum/4);

Variance formula - ANSWERstandard deviation squared

SD formula - ANSWERfind mean, (point-mean)^2, add up all the point values, divide by
the number of points, take the square root.

concatenation of strings - ANSWER"Hello" + txtName.Text + "!";

short data type - ANSWERholds small integers, non decimals

int data type - ANSWERholds medium sized integers, non decimals

long data type - ANSWERholds big sized integers, non decimals

float data type - ANSWERsmall decimal, least space

double data type - ANSWERmedium sized decimals

decimal data type - ANSWERhuge sized decimals

string - ANSWERany number of alphabetic, numerical and special characters

bool - ANSWERa true or false

date - ANSWERdates, what day is it today? January 1st

how to declare "my number" as a double? - ANSWERdouble my number;

declarations, colors - ANSWERColor.Red
Color.Black
ect