What is a type cast in c plus plus?

A type cast is an override within an expression that causes the compiler to generate conversion code and to treat the item as if it had a different type.

int a = 13;
int b = 4;
float c;

c = a / b; /* result is 3, the integer value of 13 divided by 4 */

c = (float) a / b; /* result is 3.1, the floating value of 13 divided by 4 */

In this case, the (float) keyWord was the typecast. Note also that it was not necessary to typecast b, because the compiler recognizes the mixed mode expression.