CNumeric Data Types
Numeric Types
Useint when you need to store a whole number without decimals, like 35 or 1000, andfloat ordouble when you need a floating point number (with decimals), like 9.99 or 3.14515.
float vs.double
Theprecision of a floating point value indicates how many digits the value can have after the decimal point.The precision offloat is six or seven decimal digits, whiledouble variables have a precision of about 15 digits. Therefore, it is often safer to usedouble for most calculations - but note that it takes up twice as muchmemory asfloat (8 bytes vs. 4 bytes).
Scientific Numbers
In C, you can write very large or very small floating-point numbers using scientific notation.
This is done using the lettere (orE), which stands for "times 10 to the power of".
For example,35e3 means35 × 10³ =35000.
This is useful for writing numbers in a shorter way. Especially when working with scientific values or large-scale data.
Example
double d1 = 12E4; // 12 * 10^4 = 120000
printf("%f\n", f1);
printf("%lf", d1);
