The math code for "I love you" is codes like 143 which mean the letters in "I love you" as well as 520 which is the Mandarin pronunciation "wo ai ni" or even by graphing the equation 3 sin (x) -2sin(2x) + sin(3x) =0.
The number 371 has also become popular as a shorthand way of saying "I love you" in the language of mathematics and numeric does.
You can say "I love you" in code through numbers like 143 (I-love-you, by letter count), 520 (sounds like "I love you" in Mandarin), or 831 (8 letters, 3 words, 1 meaning).
Other methods include binary (01101001 00100000 01101100 01101111 01110110 01100101 00100000 01111001 01101111 01110101), Morse code (hand signals), or creating your own simple ciphers like Caesar ciphers (shifting letters).
You can write "I love you" in a calculator by typing numbers that look like letters when the calculator is flipped upside down, using 7 for L, 3 for E, 1 for I, and 0 for O, often combined with other numbers like 143 as a shortcut for "I love you" or specific sequences like 707 (LOL) or 07734 (HELLO).