what are default integer values?

Question

I read somewhere that default floating point values like 1.2 are double not float.
So what are default integer values like 6

Answer 1

The type of integer literals given in base 10 is the first type in the following list in which their value can fit:

• int
• long int
• long long int

For octal and hexadecimal literals, unsigned types will be considered as well, in the following order:

• int
• unsigned int
• long int
• unsigned long int
• long long int
• unsigned long long int

You can specify a u suffix to force unsigned types, an l suffix to force long or long long, or an ll suffix to force long long.

Reference: C99, 6.4.4.1p5