C Declare Multiple Variables
Declare Multiple Variables To declare more than one variable of the same type, use a comma-separated list: Example int x = 5, y = 6, z = 50; printf(“%d”, x + y + z);
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C Variable Values
Change Variable Values If you assign a new value to an existing variable, it will overwrite the previous value: Example int myNum = 15; // myNum is 15 myNum = 10; // Now myNum is 10 You can also assign the…
C Format Specifiers
Format Specifiers Format specifiers are used together with the printf() function to tell the compiler what type of data the variable is storing. It is basically a placeholder for the variable value. A format specifier starts with a percentage sign…
C Variables
Variables are containers for storing data values, like numbers and characters. In C, there are different types of variables (defined with different keywords), for example: int – stores integers (whole numbers), without decimals, such as 123 or -123 float –…
C Comments
Comments in C Comments can be used to explain code, and to make it more readable. It can also be used to prevent execution when testing alternative code. Comments can be singled-lined or multi-lined.
C New Lines
New Lines To insert a new line, you can use the \n character: Example #include <stdio.h> int main() { printf(“Hello World!\n”); printf(“I am learning C.”); return 0; } You can also output multiple lines with a single…
C Output (Print Text)
Output (Print Text) To output values or print text in C, you can use the printf() function: Example #include <stdio.h> int main() { printf(“Hello World!”); return 0; }
C Statements
Statements A computer program is a list of “instructions” to be “executed” by a computer. In a programming language, these programming instructions are called statements. The following statement “instructs” the compiler to print the text “Hello World” to the screen:
C Syntax
Syntax You have already seen the following code a couple of times in the first chapters. Let’s break it down to understand it better: Example #include <stdio.h> int main() { printf(“Hello World!”); return 0; }