Programming C

Question 1

What does printf do?

Answer 1

print commands write a string which is output on screen

Question 2

What does scanf do?

Answer 2

Reads from the standard input stream until whitespace can read numbers and letters. Scanf requires variable declaration

Question 3

What does fgets do?

Answer 3

similar to scanf but can read whitespace and only needs variable

Question 4

How do we read whitespaces with scanf?

Answer 4

use the command %[^\n]

Question 5

What is the purpose of escape sequences?

Answer 5

Allows the programmer to format the output

Question 6

Give examples of format specifiers

Answer 6

%d (decimal integer)
%lf(double)
%Lf (long double)
%s (a string)

Question 7

Define a variable in C

Answer 7

Areas in the memory where data is stored and accessed

Question 8

What are some tips for naming variables?

Answer 8

Always begin with lowercase letters
Declare all variables at the start of the code

Question 9

What does strlen do?

Answer 9

returns the length of the string (ignorning the string terminator)