Code is a term that is used instead of 'language, speech, variety, or dialect.As the term 'code-mixing' suggests, it is the phenomenon of mixing two codes or two languages while speaking. For example, 'Let her be angry, I can't keep ?????? her '.On the other hand, 'code-switching' refers to the practice of alternating between two languages, that is, uttering some sentences in one language and then switching over to another.Code mixing and code-switching are the phenomena of using two languages simultaneously. These are practiced by those who are proficient bilinguals.The practice of code-mixing and code-switching is largely confined to informal speech and sometimes to very informal writing like personal letters.The speakers make a deliberate choice of mixing the codes sometimes to sound fashionable and at other times the choice is dictated by the fact that what the speakers wish to convey is expressed better in one language than in the other.Therefore, when a speaker is engaged in a conversation with someone who is equally conversant in the two languages used by the speaker, she may mix and switch the codes in order to be precise about what she wishes to convey. Hence, it is clear that code-switching and code-mixing are often seen in bilingual children.HintDyslexic children face challenges in learning the names and sounds of letters.Dyscalculia children face challenges in understanding numbers and mathematical operations.Monolingual children can speak and use only one language effectively.