CS50's Introduction to Computer Science - Week 1 / Notes

https://manual.cs50.io/
Full notes: https://cs50.harvard.edu/x/2024/notes/1/
Practice: https://cs50.harvard.edu/x/2024/psets/1/

To start we should know 3 main keys:

• how to write commands
• how to compile commands
• how to run commands

code filename.c // create a file

// compiles the file from our instructions in C and creates an executable file called
make filename

./filename // run

Building blocks:

• Functions
• Variables
• Conditionals
• Loops
• Operators
• Comments

Types and format codes

Types refer to the possible data that can be stored within a variable. Types are very important because each type has specific limits.
The number of bits limits how high and low we can count.

• bool, a Boolean expression of either true or false
• char, a single character like a or 2 and takes 8 bits(1 byte);
• double, a floating-point value with more digits than a float
• float, a floating-point value, or real number with a decimal value (32 bits = 4 bytes);
• int, integers up to a certain size (always 32 bits = 4 bytes), or number of bits
• long, integers with more bits so that they can count higher than an int
• string, a string of characters

printf allows for many format codes, full list https://manual.cs50.io/3/fprintf

int     %i
float   %f
char    %c
string  %s