A runtime error is one that is not caught by the compiler; instead, it appears when the program is run. For example (in Java), the following will fail at compile time, assumi
…ng the variable was not declared previously: x = 5; On the other hand, the following will compile correctly, but it will fail at runtime, because of the division by zero: x = 5; y = 0; z = x / y; In this case, the compiler can't know in advance what values the variable may have, but the error appears when the program is run. A runtime error is one that is not caught by the compiler; instead, it appears when the program is run. For example (in Java), the following will fail at compile time, assuming the variable was not declared previously: x = 5; On the other hand, the following will compile correctly, but it will fail at runtime, because of the division by zero: x = 5; y = 0; z = x / y; In this case, the compiler can't know in advance what values the variable may have, but the error appears when the program is run. A runtime error is one that is not caught by the compiler; instead, it appears when the program is run. For example (in Java), the following will fail at compile time, assuming the variable was not declared previously: x = 5; On the other hand, the following will compile correctly, but it will fail at runtime, because of the division by zero: x = 5; y = 0; z = x / y; In this case, the compiler can't know in advance what values the variable may have, but the error appears when the program is run. A runtime error is one that is not caught by the compiler; instead, it appears when the program is run. For example (in Java), the following will fail at compile time, assuming the variable was not declared previously: x = 5; On the other hand, the following will compile correctly, but it will fail at runtime, because of the division by zero: x = 5; y = 0; z = x / y; In this case, the compiler can't know in advance what values the variable may have, but the error appears when the program is run. ( Full Answer )